Straight answer first: the NorthStar 31-Gallon Tow-Behind Boom/Spot Sprayer is the best pull behind sprayer for pasture weeds for most people, and the CHAPIN 98444 40-Gallon is the one to buy when you have more than about 15 acres to cover. The NorthStar runs a 2.2 GPM pump rated for 100% continuous duty, throws a 120-inch boom that folds down, and pulls behind an ATV, UTV, or zero-turn without draining your battery. The CHAPIN trades boom width for a 40-gallon tank, which is the better trade once you are refilling five or six times an afternoon.
That is the whole argument, and it is a tank-size argument. Everything else — nozzle count, PSI, tire width — is secondary to how many times you have to stop and refill before the tank is empty. Get that wrong and you bought a lawn sprayer for a cattle pasture, which is exactly the complaint we read over and over in owner reviews of the smaller 15-gallon units.
I have spent the last several weeks reading hundreds of owner reviews across ten tow-behind trailer sprayers, cross-checking manufacturer spec sheets, and comparing them against what pasture owners actually say on AgTalk, NetTractorTalk, and GreenTractorTalk. This guide covers only complete trailer rigs you hitch to something and pull. No bare tanks, no hitch-mount boom kits, no ATV-mounted shells masquerading as tow-behinds.
If you are starting from scratch, you may also want our broader tow behind sprayer roundup, which covers the lawn and food-plot end of the market in more depth.
Top 3 Pull Behind Sprayers for Pasture Weed Control for October 2026
NorthStar 31-Gallon Tow-Behind
- 2.2 GPM at 70 PSI continuous duty
- 120-inch spring-loaded breakaway boom
- 31-gallon UV-resistant tank
FIMCO 15-2N-TRL-GS 15-Gallon
- 1.2 GPM fan-cooled pump
- 2-nozzle boom
- chemically resistant valves
The NorthStar takes the top spot on the strength of its review volume and its continuous-duty pump, which is the combination that matters most when you plan to spray a full morning. The CHAPIN 98444 wins on capacity alone, and the FIMCO holds the highest average rating in the group, though on a much smaller number of reviews.
All 10 Pull Behind Sprayers at a Glance for October 2026
| Product | Specs | Action |
|---|---|---|
| NorthStar 31-Gallon Tow-Behind Boom/Spot Sprayer |
|
Check Latest Price |
 CHAPIN 97600 15-Gallon EZ Tow Dripless Sprayer |
|
Check Latest Price |
 CHAPIN 97714 25-Gallon Tow-Behind Sprayer |
|
Check Latest Price |
 Brinly ST-152BH-A 15-Gallon Self-Storing Sprayer |
|
Check Latest Price |
 Grass Guardian 25-Gallon Pull-Behind Broadcast Sprayer |
|
Check Latest Price |
 Master Mfg 25-Gallon Deluxe Trailer Sprayer, 2.2 GPM |
|
Check Latest Price |
 Master Mfg SNO-11-015A-MM 15-Gallon Directional Sprayer |
|
Check Latest Price |
| FIMCO 15-2N-TRL-GS 15-Gallon Trailer Sprayer |
|
Check Latest Price |
 Brinly ST-251BH-A 25-Gallon Self-Storing Sprayer |
|
Check Latest Price |
| CHAPIN 98444 40-Gallon ATV/UTV Sprayer with Boom |
|
Check Latest Price |
Read that grid as a ladder. Everything at the bottom of it is a lawn and food-plot machine that will technically spray pasture if you refill often enough. Everything at the top is built to stay out all morning.
1. NorthStar 31-Gallon Tow-Behind — Best Overall for Pasture
NorthStar 31-Gallon Tow-Behind Boom/Spot Sprayer, 2.2 GPM, 12V, 70 PSI
31-gallon UV-resistant tank
2.2 GPM at 70 PSI continuous duty
120-inch breakaway boom
54 pounds
Pros
- 100% continuous duty pump holds pressure all morning
- 120-inch breakaway boom is the widest here
- Recirculation keeps chemical mixed
- Remote pump switch at the seat
- Removable axle and wheels for storage
Cons
- Printed instructions cover multiple versions and are hard to find
- Loose hose clamps and missing bolts out of the box
- Pump-to-boom hose is short on some builds
With nearly two thousand reviews behind it, this is the pull behind sprayer that has the least room left for surprises. The NSQ on-demand diaphragm pump delivers 2.2 GPM at up to 70 PSI and is rated at 100% continuous duty, which means it is not a pump that needs an hour off to cool. Owners routinely report a full morning of spraying without a hiccup, and that is the single most important spec on this list for pasture work.
The boom is 120 inches overall with an 80-inch effective spray width, mounted on spring-loaded breakaway arms. That is the feature that separates it from everything else here, and it is the one that matters most in a pasture full of fence posts, brush, and rock. The arms swing instead of snapping. Other brands in this roundup use fixed booms that owners describe bending after a season of hitting obstacles.
Storage is handled well too. The tow bar retracts, the boom arms fold, and the axle and wheels come off, so a rig that weighs 54 pounds running does not take up a full bay of a shed. Owners who bought it for a small yard often end up using the 19-foot vertical and 30-foot horizontal reach of the spot gun more than the boom.
The honest problems are all assembly-related. Buyers report loose hose clamps, boom nozzles dripping until tightened, and missing bolts and washers that add roughly an hour to setup. The printed manual covers several unit versions at once and is published in a format that is hard to navigate. None of that touches the pump or the tank, and all of it is a Sunday afternoon with a parts tray.
Who the NorthStar 31-Gallon suits
Owners with 5 to 25 acres who already own an ATV, UTV, or zero-turn and want a wide swath without replacing the whole rig. It also handles a mixed load well: broadcast the boom across open pasture, then swing to the wand for thistle patches, ditches, and fence lines without stopping to swap equipment.
If your time is limited and you are the only person spraying, the continuous-duty rating pays for itself the first season. A pump that overheats at hour two turns a two-hour job into a two-day one.
Who should skip it
Anyone with a small ATV and a steep hillside. At 54 pounds plus 31 gallons of water, the loaded rig is around 300 pounds on the tongue, and that is a real pull on a slope. Operators posting on AgTalk repeatedly give the same advice: match the sprayer to the largest tractor or ATV you have, not the smallest one in the yard.
2. CHAPIN 97600 15-Gallon EZ Tow — Best for Small Properties and Fence Lines
CHAPIN International Inc. 97600 15-Gallon, 12-Volt EZ Tow Dripless Fertilizer, Herbicide and Pesticide Sprayer, 15-Gallon (1 Sprayer/Package)
15-gallon tank with 5-inch wide mouth
12V pump with dual filtration
Dripless shut-off
7-foot boom
Pros
- Dripless professional shut-off with Comfort Grip lock
- 5-inch wide mouth opening speeds refills
- Dual filtration extends pump life
- Adjustable hitch on a steel frame
Cons
- 15 gallons means frequent refills past a small yard
- 7-foot boom is the narrowest here
- Pump output specs are thin compared with commercial pumps
This is the fence-line sprayer. The dripless professional shut-off with a Comfort Grip lock-on is the detail that separates it from a cheap trailer tank, because it stops the trigger drip that wastes chemical and puts a wet chemical on your glove every time you stop.
The 15-gallon translucent tank has a 5-inch wide mouth and a drain plug, and the 12-volt diaphragm pump runs through dual filtration. For a property under three acres, a food plot, or a long run of fenceline, that combination is genuinely convenient. The steel frame trailer with pneumatic tires and an adjustable hitch tows easily behind ATVs and lawn tractors.
Where it falls down is capacity. At 15 gallons and a typical 15 GPA broadcast rate, one fill covers about one acre, which means a five-acre pasture is five trips to the water source. Reviewers are consistent on this point, and so are the specs: this is not an acreage machine.
The 7-foot coverage boom is also the narrowest in the group. It is fine for spot work along edges and short passes, but for open broadcast across pasture you will be making a lot of lanes and turns.
Who the CHAPIN 97600 suits
Owners with one to three acres, a small food plot, or a long fence line to treat, who value a dripless trigger and fast refilling over raw coverage. The wide mouth and drain plug make daily mixing simple, which matters if you are mixing a small tank repeatedly.
It is also a reasonable first sprayer. If a 15-gallon trailer teaches you what you actually need, reselling it costs little and the lesson is cheap.
Who should skip it
Anyone broadcasting on more than about four acres, and anyone who hates refilling. The 7-foot boom means many passes, and a 15-gallon tank means many fills, and the two together turn a job you budgeted for an afternoon into a full day.
3. CHAPIN 97714 25-Gallon — Best Pump Output in a 7-Foot Boom
Chapin 97714: Made in The USA 25-Gallon Tow-Behind 2.5GPM/12V EZ Mount Deluxe Multi-Purpose ATV/UTV Tank Sprayer for Lawn & Garden, Farm & Acreage, Weed Control, w/ 2-Nozzle Spray Boom Attachment
25-gallon tank with 6-inch opening
2.5 GPM 12V pump
3-stage filtration
60 PSI, 60 pounds
Pros
- 2.5 GPM is among the highest output ratings in the category
- Three-stage filtration cuts clog-related downtime
- Filter basket in the cap makes mixing easy
- 12-inch pneumatic tires handle uneven ground
Cons
- 7-foot boom is narrow for open pasture broadcast
- Poly tank and fittings degrade with UV over seasons
- Diaphragm pump needs occasional disassembly
The 97714 pairs a 2.5 GPM 12-volt diaphragm pump with a 6-inch tank opening and a three-stage filtration setup: a basket in the cap, an in-tank filter, and a filter at the shut-off. That filtration chain is the quiet hero here. Weedy pasture ground puts seed, dirt, and clipped vegetation into the tank constantly, and clogging is the number one reason sprayers come off the job mid-morning.
Because it is a diaphragm pump with alligator clip quick-connect, there is no shaft and no seal to replace, and it can run dry without damage. On a job where the boom gets shut off constantly at the end of each row, that is a real advantage. The self-priming design means it does not need you to prime it by hand at every restart.
The powder-coated steel trailer with 12-inch pneumatic tires is well suited to uneven pasture ground, and the 180-inch reinforced hose with a 19-inch wand reaches ditches and tree lines the 7-foot boom cannot. Adjustable boom height lets you set the pattern for a canopy rather than a bare strip.
At 60 pounds empty and 25 gallons loaded, it is a heavier trailer than most of its size class. Reviewers do not complain about towing stability, but they do note that the poly tank and fittings show UV wear over multiple seasons, and that the diaphragm pump needs disassembly now and then to clear debris.
Who the CHAPIN 97714 suits
Owners who filter clogging is their main downtime risk — heavy thatch, ditch banks, ground cover with seed heads. The three-stage filtration and the 2.5 GPM output give you the flow rate to keep working while the chemical stays mixed and clean.
It is also a good middle choice for someone between the 15-gallon and 40-gallon ends who wants a made-in-the-USA unit with a one-year limited warranty and does not want a dealer three hours away.
Who should skip it
Owners of genuinely open pasture. A 7-foot, two-nozzle boom covers roughly 84 square feet per pass at typical speeds, so a 20-acre block becomes a long afternoon no matter how good the pump is. The pump is not the constraint here; the boom is.
4. Brinly ST-152BH-A 15-Gallon — Best When Storage Space Is the Problem
Brinly ST-152BH-A Self-Storing Tow Behind Lawn and Garden Sprayer with Collapsible Boom, 15-Gallon, Matte White
15-gallon tank
1 GPM 40 PSI dual filtration
Stores in 19 by 24 inches
2-year warranty
Pros
- Self-storing vertical design frees up a whole shed bay
- Collapsible break-away booms pass through gates and around walls
- Dual filtration supports pump longevity
- 2-year warranty from an established brand
Cons
- 1 GPM at 40 PSI is the lowest output here
- 15-gallon tank suits small properties
- Collapsible arms are narrower than dedicated broadcast booms
Brinly solves a problem no other rig on this list solves. The ST-152BH-A stands vertically on end and takes up 19 by 24 inches of floor space when stored, because the collapsible break-away booms swing in and the whole frame nests against the tank. If your shed is already full, that single feature can outweigh everything else we discuss.
The collapsible booms also solve a job-site problem. You can walk the sprayer through a gate, around a wall, or between two pieces of equipment without folding the whole rig or driving over it. Owners with narrow gates and tight driveways mention this as the deciding factor.
The 1 GPM, 40 PSI pump with dual filtration is honest, modest equipment. It will run reliably and it will last, but it is the lowest output figure in this roundup, and it means the boom refills slowly and refills often on a 15-gallon tank. The 12-foot hose and wand handle spot work fine, and the universal hitch pin fits most lawn tractors, zero-turn mowers, and ATVs.
Ratings land at 4.0 across 128 reviews, and the pattern is consistent: owners praise storage and maneuverability, and accept the capacity trade to get them.
Who the Brinly ST-152BH-A suits
Homeowners and hobby farmers with a small lawn, a couple of food plots, and no room in the garage. The 2-year manufacturer warranty from a long-running American brand also makes it an easy first purchase for someone nervous about servicing a sprayer.
Anyone spraying ditches, tree lines, and confined spaces will like the collapsible arms, since they are effectively folded away when you are not broadcasting.
Who should skip it
Pasture owners full stop. A 15-gallon tank and a 1 GPM pump is a lawn sprayer, and treating five acres with it is a refilling exercise rather than a spraying one. The narrow collapsible booms add more passes on top of that.
5. Grass Guardian 25-Gallon — Best Small-Acreage Value Rig
Grass Guardian 25 Gallon Pull-Behind Trailer Broadcast Sprayer – 1.1GPM, 7′ Swath
25-gallon tank with volume markings
1.1 GPM 12V Everflo pump
7-foot swath
20-foot spot gun
Pros
- 25 gallons and a 7-foot boom at the entry price point
- 10-inch pneumatic tires roll over rough ground
- Spot gun reaches 20 feet horizontally
- Boom shuts off independently for spot work
Cons
- 1.1 GPM moves solution slowly
- 40 PSI ceiling is low next to 60-70 psi competitors
- Limited long-term UV life in tank and boom hardware
- Instructions are minimal
The Grass Guardian does something useful that most competitors will not: it lets you kill the boom without draining it. A flow shut-off valve controls boom flow independently, so you can spot spray a weed patch with the gun and then resume broadcasting without walking back to clear the boom lines. On pasture where weeds come in patches, that is the difference between a clean pass and a swerved one.
It hitches to zero-turn mowers, ATVs, and UTVs, and the 10-inch heavy-duty pneumatic tires are wider than most in this class, which helps on uneven food plot and pasture ground. The 15-foot rubber hose with an organizing strap and the 12V alligator clamp harness with a power switch round out a simple, functional package.
The 25-gallon tank has raised volume markings molded into the polyethylene, which sounds minor until you are mixing a partial load and trying to read the level in low light. The adjustable spot gun throws 20 feet horizontally and adjusts from stream to mist, which covers fence lines and low brush well.
Where it runs out of road is the 1.1 GPM Everflo pump and the 40 PSI maximum. That combination refills the boom slowly and gives you less pressure to push a heavier canopy, and owners note the general light-duty construction, with tank and boom hardware having a limited long-term UV life. Instructions are minimal compared with the larger brands.
Who the Grass Guardian suits
Owners of one to four acres who want a 25-gallon tank without stepping up to a commercial frame, and who mostly spray patches rather than whole blocks. The 10-inch tires and the adjustable hitch make it easy to move between a lawn tractor and an ATV.
The independent boom shut-off is the quiet reason to like it. If your weed problem is scattered thistle and dock rather than a wall of brush, this saves more time than a wider boom would.
Who should skip it
Anyone expecting a decade of service or planning to run it against dense brush. At 40 PSI with a 1.1 GPM pump, the pressure left to force droplets through heavy cover is thin, and the light-duty construction shows up first in the plastic boom hardware and the tank under repeated UV exposure.
6. Master Mfg 25-Gallon Deluxe — Best Reach for Roadside and Tree Work
Master Manufacturing 25 Gallon Deluxe Lawn Pull-Behind Trailer Broadcast Sprayer, 2.2GPM
25-gallon steel trailer
2.2 GPM Everflo pump
7-foot boom
25 ft vertical gun reach
Pros
- 2.2 GPM is a real step up from 1.1 GPM trailer sprayers
- Deluxe gun reaches 25 feet vertically for tree work
- Alloy steel resists herbicide and fertilizer corrosion
- Adjustable 7-foot broadcast with dual deflector nozzles
Cons
- Lowest average rating in the group with a heavy one-star share
- Boom nozzles may arrive mis-angled
- Instructions cover two models and are poorly written
- Drain cap and hose connections can leak until tightened
Two things make this one different. The first is the deluxe adjustable spray gun, which reaches 25 feet vertically and 30 feet horizontally — the best vertical reach of any rig here. That matters for road edges, ditch banks, and tree lines where the weed is above head height and a boom sprays straight past it.
The second is the frame material. Alloy steel resists the corrosion that eats trailer sprayers working daily in glyphosate and 2,4D, and the 2.2 GPM Everflo EF2200-QA diaphragm pump with a pressure regulating system is a genuine step up from entry-level 1.1 GPM trailer pumps. Manufacturer support is responsive on pump and component replacement under the one-year warranty.
It tows behind zero-turn mowers, ATVs, and UTVs, and the adjustable 7-foot broadcast coverage uses dual deflector nozzles. The manufacturer markets it for one to two acres of lawn, food plots, and waterways, which is a fair expectation for a 25-gallon tank at 15 GPA.
But the 3.7 rating across 70 reviews is the lowest average here, and the reasons are consistent: a rough first assembly, instructions that cover both the 15- and 25-gallon models and are poorly written, boom nozzles that arrive mis-angled and need repositioning for even coverage, and drain cap and hose connections that can leak until the clamps are properly tightened. Pump-to-capability ratio is excellent; first impression is not.
Who the Master Mfg 25-Gallon suits
Owners whose pasture weed problem climbs. Bramble, multiflora rose, and roadside brush work is where the 25-foot vertical reach earns its keep, and the alloy steel frame is the right call for anyone spraying herbicide daily through a wet season.
If you are comfortable with a first-afternoon tune-up, re-angling nozzles and chasing clamps, the pump quality carries the rest of the season.
Who should skip it
First-time sprayer buyers who want a turnkey experience. The rating gap here is entirely about assembly, missing or damaged parts, and documentation, and those are exactly the problems you hit on your first afternoon. Experienced owners who do their own setup have less to complain about.
7. Master Mfg SNO-11-015A-MM 15-Gallon — Best for Sloped and Uneven Ground
Master Manufacturing SNO-11-015A-MM 15 Gallon Pull-Behind New Directional Trailer Broadcast & Spot Sprayer – 2Gpm, 7 Foot Coverage
15-gallon glyphosate tank
2.2 GPM Everflo pump
10-inch never-flat tires
7-foot coverage
Pros
- Wide wheel track and low center of gravity resist tipping on hills
- Never-flat 10-inch tires roll over rough pasture without airing down
- Inline strainer protects the pump from debris
- Foldable tongue simplifies storage
Cons
- Only the gray spray nozzle is included
- Wand does not fit the brackets shown in photos
- Instructions are vague and cover two models
- Spray chart assumes a known tractor speed
The reason to look at this 15-gallon unit is stability. It has a wide wheel track and a low center of gravity, and it sits on 10-inch never-flat tires that roll over rough pasture without airing down. Owners on hilly ground rate it specifically on not tipping and not getting a flat halfway up a slope, and that is a failure mode that ends a day in the field.
It also carries a 2.2 GPM Everflo EF2200-QA pump, which is unusually strong for a 15-gallon trailer, plus an inline strainer to keep debris out of the pump when you are working pasture and food plot ground where seed and clippings are constant.
The 12V wire harness, pressure gauge, regulator, and boom shut-off valve are all included, which is more than some competitors ship. The foldable tongue makes storage simple, and the polyethylene tank is glyphosate compatible.
What annoys owners is the accessory package. Only the gray spray nozzle ships, which limits your flow options, and the wand does not fit the brackets shown in the product photos. The instructions are vague and cover both the 15- and 25-gallon models, and the spray chart assumes a tractor speed that many tow vehicles do not have a gauge for. Owners also note that re-angling the nozzles downward improves coverage noticeably, which is a five-minute fix if you know to do it.
Who the Master Mfg SNO-11-015A-MM suits
Owners with sloped, rough, or gravelly ground who have had a lighter trailer tip or a tire go flat mid-job. The never-flat tires and low center of gravity solve the two problems that end pasture spraying days.
It is also a good match if you spray in short bursts around obstacles, because the 2.2 GPM pump refills the boom faster than a 1.1 GPM pump on the same tank.
Who should skip it
Anyone who wants a full nozzle kit out of the box or who needs the wand in a fixed bracket. You will be ordering a nozzle set anyway for pasture work, so budget for it. The capacity also limits you to roughly an acre per fill at 15 GPA.
8. FIMCO 15-2N-TRL-GS — Best Pump Reliability in a Compact Rig
FIMCO Trailer Sprayer with 2 Nozzle Boom, 15 Gallon, 1.2 GPM, 60 PSI, Model# 15-2N-TRL-GS
15-gallon trailer tank
1.2 GPM fan-cooled pump
2-nozzle boom
60 PSI, 38 pounds
Pros
- Highest average rating in the group at 4.3 stars
- Fan-cooled pump motor extends duty time in warm weather
- Chemically resistant valves and diaphragms
- Compact 38-pound trailer is easy to move and store
Cons
- 15 gallons forces multiple refills past an acre
- Spray arms described as weak for brush or heavy cover
- Power cord and tongue are short for larger tow vehicles
- Spray mist lighter than the advertised area suggests
The FIMCO earns the best value slot in this roundup, and it earns it on pump design. The 1.2 GPM High Flo pump has an internally fan-cooled motor, which is unusual at this size, and it carries chemically resistant valves and diaphragms. In practice, owners report even coverage on one to three acres and a pump that holds up over repeated use, which is exactly what you want when the alternative is a pump that overheats on a July afternoon.
At 38 pounds empty it is the lightest trailer here, which makes it the easiest to hook up, lift, and maneuver, and the 15-foot lever spray wand with 3/8-inch hose is simple and dependable. The 60 PSI maximum pressure is a real figure, not a marketing number.
I want to be straight about the catch. A 4.3 average across 36 reviews is a good rating on a thin base, and the tank is 15 gallons. Owners note that 15 gallons runs dry quickly on larger properties, that the spray arms are a bit weak for brush or heavy cover, and that both the power cord and the tongue are shorter than ideal for larger tow vehicles. The spray mist also comes out lighter than the advertised coverage suggests.
Who the FIMCO 15-2N-TRL-GS suits
Owners of one to three acres, or larger properties where you mostly spot spray. The fan-cooled motor and chemically resistant pump internals are the reason to prefer it over cheaper 15-gallon trailers, and the light weight is a genuine help for anyone loading it by hand.
If you spray in warm weather and long morning sessions, the internal cooling is the feature you will notice two seasons from now.
Who should skip it
Owners who will be regularly handling brush, brambles, or a heavy weed canopy, and anyone whose tow vehicle needs extra cord and tongue length. The arms are not built for a thick cover, and the short cord is a nuisance on a larger UTV.
9. Brinly ST-251BH-A 25-Gallon — Best Spray Tips for Low Drift
Brinly Self-Storing Tow Behind Lawn and Garden Sprayer with Collapsible Boom, 25-Gallon
25-gallon poly tank
Powder-coated steel frame
Ultra Lo-Drift tips
53 pounds, 2-year warranty
Pros
- Lo-Drift tips give good weed control with minimal wind drift
- On-demand pump runs only while the trigger is squeezed
- 25-gallon tank cuts refills versus the 15-gallon Brinly
- Collapsible swing-away booms ease tight maneuvering
Cons
- Plastic fittings can arrive cracked or pushed owners to metal parts
- Pump loses prime if particles collect on the diaphragm
- Power lead may be too short to reach the battery
- Frame and hardware feel light for rough terrain
Drift is the reason to pick this one, and on pasture with livestock and neighboring ground it is a legitimate reason. The Ultra Lo-Drift spray tips produce a coarser, heavier droplet pattern suited to contact and systemic weed control with minimal wind drift, and Brinly’s long-term owners across multiple seasons credit it with good control and little movement off target.
The pump is on-demand, running only while the trigger is squeezed, which means no idling pump on a hot afternoon and no unnecessary wear between rows. Add a 25-gallon heavy-duty poly tank that resists denting and rusting, collapsible swing-away booms, a 12-foot adjustable hose with an ergonomic thumb-control gun, and a single-pin universal hitch that fits most lawn tractors, zero-turn mowers, and ATVs.
It is built in the USA with a two-year warranty, and Brinly customer service has a record of shipping replacement pumps and parts quickly, which is worth something on a unit you intend to keep past a few seasons.
Who the Brinly ST-251BH-A suits
Owners spraying near livestock, water, or a neighbor’s boundary, and anyone working in conditions where a coarser droplet pattern is legally or practically required. The two-year warranty and responsive parts service also make it a low-risk second sprayer.
For a first acreage-sized unit, 25 gallons is the right floor, and the collapsible booms keep it manageable through gates and tight lanes.
Who should skip it
Owners who expect metal-grade hardware. Reports of plastic fittings arriving cracked or broken are common, and some owners swap in metal parts themselves. Also watch the pump: if particles collect on the diaphragm it can lose prime, and it needs periodic disassembly and rinsing to prevent that. The power lead is short on some tow vehicles.
10. CHAPIN 98444 40-Gallon — Best for Large Acreage
CHAPIN 98444 40-Gallon ATV/UTV Sprayer, 2-Nozzle Boom & 2.5 GPM Pump
40-gallon chemical-resistant tank
2.5 GPM diaphragm pump
2-nozzle boom
2-inch drain
Pros
- Largest tank in the group cuts refill trips on acreage
- 2.5 GPM pump with a 2-nozzle boom covers ground fast
- Triple filtration reduces clog downtime
- 2-inch drain empties fast for cleaning
Cons
- At 40 gallons the loaded trailer stresses small ATVs and UTVs
- Poly tank and fittings degrade with UV over seasons
- Two-nozzle boom is narrow for very large blocks
This is the capacity pick, and capacity is what you buy when you have real acreage. A 40-gallon tank at 15 GPA covers roughly 2.6 acres per fill, so a 20-acre pasture is about eight fills instead of the twenty or so a 15-gallon trailer would need. The 2.5 GPM diaphragm pump runs off a 12V alligator clip harness, can run dry with no shafts or seals to replace, and feeds the included 2-nozzle boom fast enough that the tank is not the bottleneck.
Triple filtration at the cap basket, in-tank, and at the shut-off handles the debris problem that comes with weedy ground. The 2-inch drain with a built-in 3/4-inch port empties the tank quickly for cleaning, which is the chore most people skip and most tanks need, and the locking S-clips on ratchet straps are included for securing it in a truck bed.
Its weakness is weight, and it is a real one. Forty gallons of water is 333 pounds before the trailer itself, and reviewers specifically flag that the loaded unit can stress a smaller ATV or UTV. The 2-nozzle boom is also narrower than a dedicated wide-swath broadcast boom, so big blocks still need multiple lanes. It is made in the USA with global materials and a one-year limited warranty.
Who the CHAPIN 98444 suits
Owners with 15 acres or more, or anyone who would rather make four long refills than fifteen short ones. It also has the strongest sales presence of any rig here, which reflects how widely it is used for farm and acreage spraying.
If you tow with a tractor or a UTV rated for the load, the refill savings compound fast across a season.
Who should skip it
Anyone towing with a small ATV on a slope. This is the single most common complaint in its reviews and it is a physics problem, not a design flaw. Also skip it if you will only ever spray under five acres, because you will carry the weight around without using the capacity.
How to Choose a Pull Behind Sprayer for Pasture Work?
Tank size and acres per fill
Gallons per acre is the number that decides everything. Most pasture broadcast labels call for somewhere between 15 and 20 GPA of finished spray, and a 15-gallon tank at 15 GPA covers exactly one acre. A 25-gallon tank covers 1.6 acres, a 31-gallon tank covers about 2 acres, and a 40-gallon tank covers 2.6 acres.
At 20 GPA the same tanks cover 0.75, 1.25, 1.5, and 2 acres. Multiply that by the number of acres you spray, subtract your water source walking distance, and pick the tank that keeps you from making a fill trip more than once an hour. If your water is at the house and the pasture is 400 yards away, size the tank up.
Pump output, PSI and duty cycle
GPM tells you how many nozzles the pump can feed at once, and PSI tells you how hard it can push them. Most boom sprayers in this class run between 1.1 and 2.5 GPM at 40 to 70 PSI, and all of them will work, but the top of that range is what lets you finish a pass while the tank still has product in it.
Duty cycle matters more than peak GPM for long jobs. A pump rated at 100% continuous duty runs a full morning; one rated at 20 to 50% needs cooling breaks. Owners reporting pumps that get hot and quit are almost always running an intermittent-duty pump past its limit. Look for the continuous duty rating in the spec sheet, not just the flow number.
Boom or boomless for pasture weeds
A boom gives you even, narrow-band coverage with the least chemical per acre, which is what you want in open forage. A boomless nozzle throws a wide fan of 20 to 30 feet from a single point, so it covers more ground per pass but puts product where you did not aim it, and coverage is uneven at the edges. Booms also snag. The most common complaint theme across owner forums is rigid booms bending on fence posts, trees, and rocks in real pasture ground.
For broadcast across open pasture, a boom with breakaway or collapsible arms is the right answer, and that is why the NorthStar’s spring-loaded arms and the Brinly’s collapsible booms matter. For ditches, tree lines, and fence rows where weeds escape a normal boom, boomless wins, and hay and forage publications describe them as handy at any operation size for exactly those jobs. If your ground is brush-thick, a boomless unit or a hand wand will outlast anything with a wide boom. If your ground is open and you are grazing livestock, boom control is worth the extra care.
Hitch type, tongue weight and slope limits
Most of these rigs use either a single-pin universal hitch or an adjustable clevis hitch, and both fit common lawn tractors, zero-turn mowers, ATVs, and UTVs without modification. Check your tow rating, though. A 40-gallon tank plus trailer is well over 300 pounds loaded, and a smaller ATV will feel every hill you point it at.
The rule operators on AgTalk and NetTractorTalk repeat is simple: size the sprayer to the largest tractor or ATV you have, not the smallest. A three-point sprayer on the biggest tractor is the default recommendation among experienced operators, and if your ground is steep, that is the honest answer rather than any tow-behind. Keep the tank fuller than you think you need, and never tow a heavy rig empty uphill on a slope you would not drive up with a full bed.
Matching the sprayer to the weed you actually have
Thistle, dock, and broadleaf pasture weeds need a boom at 15 to 20 GPA with a moderately coarse droplet, and a rig with a functioning wand for the patches a boom cannot reach. Brush and bramble need pressure and reach, which favors a long-reach gun and a higher-PSI pump like the Master Mfg units, plus spot work rather than broadcast. Grass weeds respond to different chemistry and often to a lower volume, so match the nozzle and rate to the label rather than the machine.
No tow-behind replaces a backpack for isolated patches in a corner or behind a gate. Owners converge on owning both, using the tow-behind for broadcast and the hand sprayer for a heavier hit on individual thistles and brambles where a boom cannot target. If you can only buy one, buy the tow-behind and plan on a hand unit later.
Calibrate in five steps with water only
First, run the tank with clean water and check every nozzle for a consistent pattern, replacing any that spit or run thin. Second, measure a known distance, typically a quarter mile, and mark the start and end. Third, collect the water from a timed run over that distance in a graduated container, timing only while you are actually spraying. Fourth, divide the collected volume by the distance covered in feet to get gallons per hundred feet, then multiply by the boom width in feet to get gallons per thousand square feet, and convert that to GPA. Fifth, compare the result to the rate on the herbicide label and swap the nozzle tip or adjust pressure until the two match.
Do this every season and any time you change nozzles, pump pressure, or ground speed. An uncalibrated boom is the most common reason a pasture treatment underperforms, and it is also the most expensive mistake, because you have already paid for the chemical.
Rinse, storage and winterizing
After every job, triple-rinse: fill the tank with clean water, run the boom and wand for a few minutes, drain it, and repeat until it runs clear. Most of the rigs here have a bottom drain or a drain plug, and the CHAPIN 98444 adds a 3/4-inch port for faster emptying. Check the inline strainer and shut-off filter while you are at it, since that is where debris collects.
Before winter, blow out the lines with air if your pump allows it, then fill the pump with antifreeze and run it until the fluid reaches the wand tip, and disconnect the battery. Do not store chemical in the tank over winter, because it attacks seals and hoses. Pull the nozzles, wrap them, and store the rig drained and dry. The NorthStar and Brinly self-storing designs make this a five-minute job because the whole frame nests against the tank.
For a broader look at how these rigs compare on smaller properties, our tow behind spreader guide covers the fertilizer side of the same trailer platform, and if you are maintaining the grass first before spraying it, the walk behind mower picks are worth a look.
Frequently Asked Questions
What is the best pull behind sprayer?
The NorthStar 31-Gallon Tow-Behind is the best all-round pull behind sprayer for pasture weeds, with a 2.2 GPM pump rated at 100% continuous duty, a 120-inch spring-loaded breakaway boom, and a 31-gallon UV-resistant tank. For more than about 15 acres, the CHAPIN 98444 40-gallon cuts refill trips far more than its narrower boom costs you in extra passes.
What is the best ATV sprayer with a boom?
For an ATV specifically, the NorthStar 31-Gallon is the strongest fit because its spring-loaded breakaway boom arms flex past fence posts and rocks instead of bending, and its 12-inch pneumatic wheels roll over uneven pasture ground. The CHAPIN 97714 25-gallon is the alternative if clogging from seed and clippings is your main problem, thanks to its three-stage filtration.
How many acres will 25 gallons spray?
At a standard 15 gallons per acre broadcast rate, a 25-gallon tank covers about 1.6 acres per fill. At 20 GPA it covers about 1.25 acres. For reference, a 15-gallon tank covers 1 acre at 15 GPA, a 31-gallon tank about 2 acres, and a 40-gallon tank about 2.6 acres. Always check the rate on your herbicide label, since that number sets the coverage.
Should I buy a boom or a boomless sprayer for pasture weeds?
Buy a boom for broadcast across open pasture, because it delivers even coverage with the least chemical per acre. Choose boomless for ditches, tree lines, and fence rows where weeds escape a normal boom, or for brush-thick ground where a wide boom will constantly snag. Many owners keep both and use a hand wand for isolated patches.
What is the best sprayer for spraying weeds?
For broadleaf pasture weeds such as thistle and dock, a tow-behind with at least 25 gallons and a functioning wand handles both the broadcast and the patches a boom cannot reach. For brush and brambles, look for higher pump pressure and a long-reach spray gun. The Master Mfg 25-gallon Deluxe reaches 25 feet vertically for exactly that job.
What is the best pull type or agricultural power sprayer?
Pull type tow-behinds make sense up to roughly 15 to 20 acres with an ATV or UTV. Beyond that, or on steep ground, a three-point sprayer on your largest tractor is the standard recommendation among experienced operators on AgTalk and NetTractorTalk, and commercial-scale work belongs in self-propelled or 3-point units rather than a trailer rig.
The Best Pull Behind Sprayer for Your Pasture
For most people buying the best pull behind sprayer for pasture weeds in 2026, the NorthStar 31-Gallon is the answer, because a 100% continuous duty pump and a boom that survives obstacles are worth more than a bigger tank. If you have more than 15 acres, step up to the CHAPIN 98444 40-gallon and accept the extra weight. If you are under five acres and mostly spot spraying, the FIMCO 15-gallon is the cheapest way to own a pump that will still work in three years.
Whichever one you pick, calibrate it before the first pass, keep a hand sprayer for the corners, and size the rig to the largest tow vehicle you have. That is the combination that keeps a pasture weed job down to a single afternoon.