The best ATV sprayers make large-property weed control far less tiring because a 12V pump moves the mix while you drive. The right model is not simply the biggest tank: it must match your rack or hitch, terrain, spray pattern, and the amount of solution your ATV can safely carry.
Our team compared the verified listings for 10 current ATV and UTV sprayers, focusing on tank volume, pump output, hose reach, filtration, boom type, ratings, and reported drawbacks. We found a clear split between compact spot sprayers for gates and fence lines, mounted broadcast units for regular coverage, and tow-behind rigs for rougher ground.
An ATV sprayer is a battery-powered tank-and-pump system that sends herbicide, fertilizer, or pest-control solution through a wand, boom, or boomless nozzles. Most connect with alligator clips to a 12V battery, so checking wire routing and a fused connection before filling the tank matters as much as choosing the stated GPM.
One practical warning comes up repeatedly in owner discussions: inspect the drain plug, hose fittings, and mounting straps before the first full load. Users also often replace basic spray tips with a TeeJet-style nozzle for a more consistent pattern, but use a tip rated for your chemical and follow the chemical label.
Top 3 picks answer the most common ATV sprayer needs in 2026
The Ag Spray 25-Gallon Boomless suits wide, obstacle-heavy coverage, while the Chapin 97214 is the more feature-rich mounted boom choice. For a compact rack sprayer with both broadcast and spot capability, the Grass Guardian 15-Gallon is the sensible middle-ground selection.
These are the best ATV sprayers in 2026 at a glance
Read the tank and pump figures as a starting point, not a coverage promise. Application rate depends on nozzle selection, pressure, driving speed, vegetation, and the directions on the product label.
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1. Ag Spray 25-Gallon Boomless is the strongest choice for broad obstacle-heavy coverage
Ag Spray Equipment 25 Gallon Boomless Spot Sprayer – 4.0 GPM Diaphragm Pump, Deluxe Handgun, 3-Nozzle Boom, 12V ATV Sprayer for Lawn, Garden, Fence Lines, Food Plots & Acreage
25 gallon
4.0 GPM
30 foot boomless width
The Good
- High 4.0 GPM flow
- 30 foot boomless coverage
- 35 foot handgun reach
- adjustable nozzle
The Bad
- 45 PSI maximum
- limited review sample
This Ag Spray unit earns our top position because its 4.0 GPM diaphragm pump is the most forceful pump in this group and its three-nozzle boomless setup is rated for a 30-foot spray width. That layout is a strong fit for food plots, field edges, and ground where a rigid boom could strike brush or dip into ruts.
The 25-gallon polyethylene tank keeps refill stops more manageable than a 40-gallon setup, yet the listed 35-foot horizontal reach from the deluxe handgun gives the operator a useful way to treat a ditch, fenceline, or tight corner. Its 4.3 rating comes from 60 reviews, which is a modest evidence base rather than a large-volume consensus.
We like that the adjustable nozzle can move from a stream to a fan pattern, since broadcast work and spot work ask for different output. The stated 45 PSI ceiling is lower than several spot-focused models, but spray width and high flow are the priority here, not maximum wand pressure.
The boomless layout answers uneven-ground spraying needs
A boomless sprayer sends liquid outward from nozzles near the tank instead of carrying a long bar behind the ATV. It gives up some of the fixed, tightly defined pattern of a boom, but it avoids many strikes with saplings, rocks, and fence posts.
Keep the nozzles clean and drive consistently if uniform coverage matters. A clogged outside nozzle can leave one side short, so a water-only pattern check before chemical work is a sensible routine.
The 25-gallon tank answers medium-acreage workload needs
A full 25-gallon tank weighs substantially more than the empty 30-pound listed unit once solution is added. Confirm the rear rack rating and secure the tank low and centered; a load that shifts changes ATV handling quickly on a slope.
For recurring acreage work, use the molded drain after a rinse rather than leaving a mix in the tank. Forum reports often point to leaks around drain areas, so inspect that connection before every full fill.
2. Chapin 97214 EZ Mount is the best equipped mounted boom sprayer
The Good
- EZ MOUNT system
- 3-stage filtration
- 7 foot boom
- 15 foot reinforced hose
The Bad
- 3.9 rating
- 18 percent one-star reviews
The Chapin 97214 bundles the pieces many riders want for controlled lawn, pasture, and food-plot work: a 25-gallon translucent tank, self-priming 2.5 GPM 12V pump, 15-foot reinforced PVC hose, and a two-nozzle boom with a stated 7-foot pattern. The quick-connect EZ MOUNT design is the feature that separates it from basic rack sprayers.
Its three-stage filtration is a major practical advantage. The cap basket, in-tank filter, and shut-off filtration address the same clogging concern that appears repeatedly in owner forums, where debris in a mixed tank can turn a simple job into nozzle cleanup.
There is an important tradeoff: its 3.9 average comes from 172 reviews, and 18% are one-star ratings. That does not rule it out, but it makes a careful delivery inspection, hose check, and first water test especially worthwhile.
The filtration system answers clog-prevention needs
Fill through the filter basket and rinse that basket after every mix. Filtration cannot correct a chemical that has settled or a dirty water source, but it can stop larger debris before it reaches the small openings in the boom tips.
Use clean water for the final rinse, run it through the wand and boom, and remove visible debris before storage. That routine also reduces the odds of residue affecting the next application.
The EZ MOUNT system answers frequent on-and-off use
The quick-connect mounting approach is most helpful when an ATV performs more than spraying duties. Before relying on it in the field, pull firmly on the empty tank and check that the rack and attachment points do not flex.
A 7-foot boom favors steady passes over open ground. Turn off boom flow before a tight turn or an obstacle, then use the wand for isolated weeds rather than dragging the boom through cover.
3. Grass Guardian 15-Gallon ATV model is the most balanced compact broadcast option
Grass Guardian 15 Gallon ATV & UTV Broadcast Boom Sprayer - 1.1GPM, 7' Swath
15 gallon
1.1 GPM
7 foot broadcast swath
The Good
- Includes ratchet straps
- 7 foot swath
- 20 foot spot reach
- 15 foot rubber hose
The Bad
- Only 21 reviews
- 40 PSI maximum
The Grass Guardian 15-Gallon ATV model combines a 7-foot broadcast swath with a spot gun rated to reach 20 feet horizontally. That two-mode arrangement works well for a small property where broad passes handle open grass and the wand handles thistles around trees, gates, and fence lines.
Its 1.1 GPM 12V Everflo diaphragm pump and 40 PSI maximum are modest figures, yet they fit the stated 7-foot boom task. We also appreciate that two mounting ratchet straps and a wire harness with power switch are included, because loose mounting is a common source of frustration on rough trails.
The 15-gallon tank and 27-pound empty weight should be easier on a rear rack than larger alternatives. Its 4.1 rating is based on 21 reviews, so treat that score as limited feedback and check all hardware during setup.
The included straps answer rack-mounting security needs
Route each ratchet strap so it cannot rub a tire, axle, exhaust component, or sharp rack edge. Retighten after a few minutes of travel because plastic tanks and webbing can settle under vibration.
The power wire needs similar attention. Leave enough slack for suspension movement, keep it away from heat, and disconnect it before washing the ATV.
The dual spray modes answer mixed-property needs
Use the boom with the shut-off valve open for repeatable passes across open turf or a food plot. Use the adjustable gun for a stream or mist where a broad pattern would hit desirable plants.
Calibrate the pattern with water over a known distance before applying product. The correct driving speed comes from the label rate and nozzle output, not from running the pump at its limit.
4. Chapin 98444 is the best large-capacity boom option for fewer refill stops
Chapin 98444 ATV 40G Water Tank Sprayer with 2-Nozzle Boom and 2.5 GPM Pump, for Agriculture/Farming/Acreage
40 gallon
2.5 GPM
2-nozzle boom
The Good
- 40 gallon capacity
- 2.5 GPM pump
- triple filtration
- reinforced hose
The Bad
- Large filled load
- limited review volume
The Chapin 98444 is the capacity pick in this roundup, pairing a 40-gallon chemical-resistant tank with a 2.5 GPM diaphragm pump and a two-nozzle boom. It is built for the operator whose main problem is stopping to refill during larger lawn, pasture, or agricultural passes.
A six-inch opening supports filling and mixing, while the triple-filtration system helps protect the boom and wand from debris. The 180-inch reinforced hose and 20-inch poly wand add useful reach when the ATV cannot get close to a target.
The 4.2 rating is based on 50 reviews. More important than the score is load management: users in forums specifically warn that 40-gallon tanks can be too heavy for some ATVs after solution is added, so check the machine manual before choosing this capacity.
The 40-gallon capacity answers high-volume coverage needs
Forty gallons can reduce interruptions, but it also places much more mass on the vehicle than a 15- or 25-gallon system. A larger tank belongs on an ATV or UTV with sufficient payload and a level, stable mounting surface.
Mix only what you can apply within the label directions that day. Carrying unused chemical over rough ground is harder on the vehicle and gives residue more time to settle.
The triple filtration answers dirty-water concerns
The three filters work best when they are treated as service items, not permanent parts. Inspect the cap screen, tank filter, and shut-off filter after work involving powdered products or water from a source with sediment.
Do not force a clogged tip with extra pressure. Shut down, relieve pressure, and clean the nozzle with an appropriate soft brush or approved tool.
5. Ag Spray 25-Gallon Bronze is the straightforward spot-spraying workhorse
Ag Spray Equipment 25-Gal Bronze Spot Sprayer | 1.2 GPM 12V Pump (60 PSI)
25 gallon
1.2 GPM
15 foot hose
The Good
- UV-resistant tank
- 29 inch wand
- adjustable gun
- built-in strainer
The Bad
- Spot-only configuration
- 60-review sample
The Ag Spray 25-Gallon Bronze is a focused choice for riders who want a substantial tank without an attached broadcast boom. Its 1.2 GPM, 60 PSI diaphragm pump feeds a 29-inch wand through 15 feet of hose, giving it a useful working radius for targeted weed control.
We rate its physical setup highly for fence rows and property edges: the low-profile polyethylene tank helps stability, and the adjustable spray gun has a built-in strainer. The UV-resistant 25-gallon tank is also a sensible match for equipment that spends time outdoors.
This unit carries a 4.3 average from 60 reviews. It does not replace a broadcast sprayer if you need uniform open-field coverage, but it is less complicated for selective treatment around obstacles.
The 29-inch wand answers stand-off reach needs
A longer wand lets you direct solution into brush without leaning over a rack-mounted tank. Use the adjustable nozzle for a controlled stream when treating a single target and a wider setting only where the label permits.
Hold the nozzle at a consistent distance from the target. Excessive pressure or a high wand position can create drift, which is a poor fit near ornamentals, water, or neighboring vegetation.
The 15-foot hose answers fence-line reach needs
Fifteen feet is enough for many gates and fence lines while keeping hose management simple. Coil it after each use rather than leaving it pinched under straps or against a sharp rack corner.
Before the first application, run water through the handgun and inspect every connection for a drip. A small leak is easier to correct with water than after chemical mixing.
6. Chapin 8-Gallon ATV Spot Sprayer is the best compact choice for small jobs
Chapin 8-Gallon ATV Spot Sprayer, 12V Pump for Easy Spraying
8 gallon
1 GPM
60 PSI
The Good
- Light 9 pound empty weight
- 10 foot hose
- 20 inch wand
- chemical-resistant tank
The Bad
- Small tank
- spot spraying only
The Chapin 8-Gallon ATV Spot Sprayer is the most practical option here for a few acres, a driveway edge, or recurring spot treatment. At a listed empty weight of 9 pounds, it is much easier to lift onto a rack than the 25- and 40-gallon models.
Its 12V 1 GPM diaphragm pump reaches a stated 60 PSI maximum, and the package includes a 20-inch wand, adjustable poly nozzle, and 10-foot hose. The translucent chemical-resistant tank is intended for fertilizers, pesticides, and herbicides.
With 294 reviews and a 4.3 average, this is one of the better-supported ratings in the group. The capacity is intentionally limited, so we would choose it for precision rather than for treating a broad pasture in one session.
The eight-gallon tank answers small-property handling needs
An eight-gallon tank reduces both rear-rack weight and leftover-solution risk. It is a good match when your work is scattered weeds rather than continuous coverage, and it stores with less bulk than a large rig.
Even a compact tank needs a secure mount. Center it on the rack, protect the tank from abrasive metal edges, and avoid over-tightening straps against the plastic.
The adjustable nozzle answers selective-treatment needs
The poly nozzle can be adjusted for the task, but the chemical label still controls nozzle choice, droplet size, protective gear, and application conditions. Do a water check for leaks and pattern before every new mix.
Afterward, flush the wand and hose until only clean water comes through. Leaving product in the line is a common path to clogged tips and shortened seal life.
7. Grass Guardian 25-Gallon Trailer is the best pull-behind choice for rough ground
Grass Guardian 25 Gallon Pull-Behind Trailer Broadcast Sprayer - 1.1GPM, 7' Swath
25 gallon
1.1 GPM
10 inch pneumatic tires
The Good
- Tow-behind design
- 10 inch pneumatic tires
- 7 foot swath
- 20 foot spot reach
The Bad
- 4.0 rating
- 14 percent one-star reviews
The Grass Guardian 25-Gallon Trailer moves the tank load off the ATV rack and onto a tow-behind frame with 10-inch pneumatic tires. That is a useful design for riders who want 25 gallons of capacity but do not want the full load high on the rear carrier.
It pairs a 1.1 GPM Everflo pump with a 7-foot broadcast swath and an adjustable spot gun rated to 20 feet horizontally. The unit can hitch to zero-turn mowers, ATVs, and UTVs, making it more flexible than a dedicated rack sprayer.
It has an average rating of 4.0 from 83 reviews, including 14% one-star ratings. Check the hitch, tire pressure, and boom valve before work, particularly because a trailer can bounce more than a rack-mounted tank across holes and side slopes.
The trailer frame answers rack-payload limits
Pull-behind equipment puts much of the liquid weight on its own axle, but it adds length behind the vehicle. Allow extra room for turns and do not reverse sharply with the boom or hose exposed.
Match tow speed to terrain. Faster travel can make the trailer bounce, alter the pattern, and stress fittings that were secure on smooth ground.
The pneumatic tires answer uneven-terrain needs
The listed 10-inch tires are intended for tougher terrain than a simple skid tank. Inspect them for cuts and maintain equal pressure so the boom remains reasonably level during application.
For a field with heavy brush, use the spot gun where the boom cannot pass cleanly. This avoids broken nozzles and prevents unwanted application on obstacles.
8. Chapin 97254 is the simple 25-gallon spot sprayer for regular targeted work
Chapin 97254 25-Gallon Mounted ATV/UTV Spot Sprayer
25 gallon
1 GPM
60 PSI
The Good
- 16 foot hose
- wide 6 inch opening
- chemical-resistant seals
- filter cap
The Bad
- 1 GPM limits broad coverage
- 4.1 rating
The Chapin 97254 keeps the design simple: a 25-gallon chemical-resistant poly tank, 1 GPM diaphragm pump, 60 PSI maximum, and a 192-inch hose. It is for operators who mostly work with a wand and value a larger supply over boom coverage.
The six-inch wide opening and filter cap make filling and mixing less awkward than a narrow-neck tank. Chapin lists it as compatible with standard fertilizer and weed killer, and its chemical-resistant seals are relevant when the sprayer is cleaned properly after every use.
Its 4.1 average is based on 48 reviews. The 1 GPM output is sufficient for deliberate spot spraying, but it will not work as quickly as the 2.5 or 4.0 GPM models where large-area output is the goal.
The 16-foot hose answers reach-from-the-rack needs
Sixteen feet of hose lets the operator leave the ATV parked while addressing a longer fence section or a drainage edge. Keep the hose behind you rather than across the path of the tires.
The extra hose length also means more line to flush. Continue rinsing until the wand output runs clear, then drain the tank and store the hose without hard kinks.
The wide opening answers easier mixing needs
A broad opening helps when filling from a container and when rinsing the inside of the tank. It does not remove the need to measure product carefully or follow the label sequence for adding water and concentrate.
Use the filter cap on every fill. Any grit caught there is grit that cannot collect in the pump or nozzle.
9. Chapin 97664 is the tow-behind option for riders who want a faster pump
Chapin 97664: Made in The USA 15-Gallon Tow-Behind 2.5GPM/12V EZ Mount Deluxe Multi-Purpose ATV/UTV Tank Sprayer for Lawn & Garden, Farm & Acreage, Weed Control, with 2-Nozzle Spray Boom Attachment
15 gallon
2.5 GPM
12 inch pneumatic tires
The Good
- 2.5 GPM self-priming pump
- 12 inch tires
- 3-stage filtration
- 7 foot boom
The Bad
- 3.6 rating
- 20 percent one-star reviews
The Chapin 97664 has a 15-gallon tank on a powder-coated steel tow-behind trailer, plus a self-priming 2.5 GPM pump and 12-inch pneumatic tires. It is a compelling specification set for someone who needs more pump output than typical compact units and prefers a trailer over rack weight.
The package also includes three-stage filtration, a 19-inch poly wand, 15-foot reinforced hose, and a two-nozzle boom with a stated 7-foot pattern. Its EZ MOUNT quick-connect arrangement may help owners who switch configurations during the season.
This is a cautious recommendation because it holds the lowest rating in this list at 3.6 from 142 reviews, with 20% one-star ratings. Buy it for its verified trailer-and-pump features only if you are willing to complete a thorough water test and inspect the assembly before field use.
The 2.5-GPM pump answers faster-output needs
GPM measures how much liquid a pump can move, not automatic coverage quality. Higher flow can support boom output and quicker refill transfer, but the nozzle and regulated pressure still determine the pattern at the ground.
Use the boom only at a pace that keeps overlap even. A quick pass with inconsistent pressure can waste solution and leave untreated strips.
The 12-inch tires answer challenging-trail needs
Larger pneumatic tires can help a trailer follow uneven ground, though they cannot prevent every bounce. Keep the boom raised or shut off during transport and watch clearance at creek crossings and steep transitions.
Check wheel fasteners and hitch hardware periodically. A tow-behind sprayer is only as stable as the connection between its frame and the towing vehicle.
10. VEVOR 15.9-Gallon model offers the widest stated wand reach and pressure range
The Good
- Built-in gauge
- brass nozzle
- 20 foot hose
- adjustable pressure
The Bad
- 3.5 rating
- 22 percent one-star reviews
The VEVOR 15.9-Gallon sprayer stands out for its listed 20-foot hose, built-in pressure gauge, 1.9 GPM flow rate, and adjustable working pressure from 0 to 72 PSI. It also lists a 21-foot horizontal and 18-foot vertical spray reach, which makes it attractive for reaching brush from a safe position.
The telescopic boom, brass nozzle, ratchet straps, and 5.6-inch tank opening give this model a broad feature list for an ATV, UTV, or tractor setup. The pressure gauge is particularly useful because it helps the operator see changes rather than guessing from the spray pattern.
We place it last because the rating is 3.5 from 72 reviews and 22% are one-star ratings. Its reach and adjustability are real listed strengths, but inspect its fittings, straps, and operation carefully with clean water before relying on it for a major treatment day.
The pressure gauge answers repeatable-application needs
A gauge gives you a reference point when a nozzle pattern changes, a filter starts to block, or a hose connection has a problem. It does not replace calibration, but it gives more information than a system with no visible pressure reading.
Set pressure while stationary with water first, then recheck at working engine speed. Never assume the highest listed pressure is the correct setting for the chemical or nozzle.
The 20-foot hose answers long-reach spot work
A 20-foot hose can reach around vegetation and into corners without repositioning the ATV. Keep it fully visible while working so it does not hook on a stump, wheel, or hitch.
The brass nozzle is a durable material choice, but any nozzle can clog or wear. Rinse it after use and replace it if the pattern becomes uneven after cleaning.
The buying guide answers how to choose an ATV sprayer
Start with the work, then choose the sprayer. A spot sprayer is for individual weeds, fence lines, tree rows, and locations where you must direct the liquid; a broadcast sprayer uses a boom to cover a consistent band while driving; and a boomless sprayer throws a wider pattern without a long bar.
Boom sprayers are better for uniform open-ground coverage
A boom sprayer is the better choice for smooth, open ground where you can make parallel passes. The fixed nozzles create a defined swath, such as the 7-foot patterns listed on several products here, which makes overlap and rate control easier.
A boomless sprayer is better for rough areas, irregular borders, brush, and obstacles because there is no extended bar to hit. It can cover a wider path, but the operator must pay close attention to nozzle condition, speed, wind, and overlap.
A 15- to 25-gallon tank fits many ATV jobs
Choose tank size by how much solution your application rate requires and what your vehicle can carry or tow. An 8-gallon tank works for scattered spot work, 15 gallons suits modest mixed jobs, and 25 gallons is a practical capacity for longer sessions without becoming as demanding as a full 40-gallon rack load.
Do not select 40 gallons simply to avoid refilling. Water weighs about 8.3 pounds per gallon before the tank and equipment weight are included, so a filled 40-gallon setup needs a vehicle and mounting system that the manufacturer permits for that payload.
GPM and PSI answer different pump-performance questions
GPM means gallons per minute and describes pump flow. A 1.0 or 1.1 GPM pump is well suited to deliberate spot spraying and smaller booms, while 2.5 GPM and 4.0 GPM systems can supply more flow for wider patterns or faster filling demands.
PSI means pounds per square inch and describes pressure. More PSI is not automatically better: the correct setting is the one specified by the nozzle and chemical label, producing the intended droplet size while limiting drift.
Mounting style answers vehicle capacity and terrain needs
Rack-mounted tanks are compact and easy to maneuver, but they put liquid weight on the ATV. Keep the load low, centered, and firmly strapped down, then check that tail lights, exhaust, suspension travel, and the rider’s movement are not blocked.
Tow-behind sprayers move weight to their own tires and can be friendlier to a smaller rack. They need room to turn, a sound hitch, and a slower pace over holes or side slopes.
Filtration and seals answer chemical-care needs
Use products only where the sprayer maker and chemical label permit them. Chemical-resistant seals can help, and filtration at the fill opening, in the tank, or near the shut-off helps prevent debris from reaching the pump and tips.
Do not use bleach unless both the sprayer manufacturer and bleach label explicitly allow it. Bleach can harm components, and mixing residues with other chemicals can create dangerous reactions; dedicate equipment or follow compatible cleaning directions when needed.
Flushing and winter storage answer long-term reliability needs
After spraying, drain unused mix according to the chemical label, rinse the tank, and circulate clean water through the hose, wand, pump, and boom. Clean filters separately and look for seepage at the drain plug and hose fittings before putting the equipment away.
Before freezing weather, remove as much water as possible and follow the product manual for storage steps. A pump or hose left with water inside can be damaged by freezing, and dried residue can restrict the system next season.
Calibration answers accurate coverage needs
Calibrate with clean water on a measured course before applying any product. Note the nozzle pattern, travel speed, pressure, and the amount used, then compare that result with the chemical label rate.
Wear the protective equipment specified on the label and avoid spraying in conditions that carry droplets off target. Accurate application protects desirable plants, helps control runoff, and prevents repeated work caused by missed strips.
These answers cover common ATV sprayer questions
Who makes the best ATV sprayer?
Ag Spray, Chapin, Grass Guardian, and VEVOR each make ATV sprayers for different needs. In this comparison, Ag Spray’s 25-Gallon Boomless is the strongest broad-coverage choice because it combines a 4.0 GPM pump, a 30-foot stated spray width, and a 25-gallon tank; Chapin offers strong filtration and mounted-boom choices.
Which is better, a boom or a boomless sprayer?
A boom is better for uniform coverage on smooth, open ground because its nozzles make a defined swath. A boomless sprayer is better around brush, uneven terrain, and obstacles because it has no long bar to strike; it needs careful attention to nozzle pattern, driving speed, and overlap.
What size ATV sprayer do I need?
Choose an 8-gallon spot sprayer for small, targeted jobs, a 15-gallon model for modest mixed work, and a 25-gallon unit for longer sessions. Select 40 gallons only when the ATV, UTV, or trailer is rated for the added liquid weight and the work genuinely needs fewer refills.
How do you make an ATV sprayer boom?
Use a chemical-compatible boom frame, nozzles, hose, shut-off valve, and secure rack mounting, then connect the plumbing to a correctly sized 12V pump. Test only with water first, verify an even pattern at the intended speed, and follow the chemical label for nozzle, pressure, and safety requirements.
The best final choice depends on your spraying pattern
The Ag Spray 25-Gallon Boomless is our overall choice for broad coverage around rough ground, while the Chapin 97214 is the more complete mounted boom setup for controlled passes. Choose the Chapin 8-Gallon model when light, targeted work matters more than capacity, and choose a trailer model when rack payload is the limiting factor.
The best ATV sprayers in 2026 are the ones you can mount securely, calibrate accurately, clean completely, and use within the chemical label directions. Confirm your vehicle capacity, complete a water-only test, and inspect every fitting before the first full tank.