Why Shop with Us
Customers also Bought:
The Chapin Professional 4 Gallon backpack sprayer is the pros choice for larger spray jobs. The sprayer features an over-sized filler cap that makes filling the tank easy with less spilling, large capacity 4 gallon tank, and carrying straps for fatigue-free and hands-free operation. The positionable pump handle allows for right or left hand use. Finally, a reinforced hose with extended wand and adjustable nozzle allows for spraying a fine mist to a coarse spray. Heavy-duty poly construction and VITON chemical resistant seals ensure years of protection and resistance to wear and tear.
This backpack sprayer comes with a Brass Cone Adjustable Nozzle, Plastic Adjustable Cone Nozzle, and a Plastic Fan Tip Nozzle (Fan Tip is not adjustable, it is a fixed fan pattern). There is NOT a Brass Fan Tip Nozzle available for this sprayer.
|Sprayer Type:||Back pack sprayer|
|Tank Size (gal.):||4 Gal.|
|Material / Construction:||Heavy duty polyethylene|
|Spray Pattern:||Pin stream, fan, fine mist, coarse stream|
|Hose Length (in.):||48 in.|
|Wand Length (in.):||20 in.|
|Pressure (PSI):||15 - 60 psi|
|Special Features:||Over-sized filler cap to make filling and cleaning easy, basic shoulder straps, positionable pump handle allows for right or left hand use, reinforced hose with extended wand and adjustable nozzle allows for spraying a fine mist to a coarse spray|
|Parts Included:||20 in. plastic wand, basic shoulder straps, adjustable cone nozzle|
|Shipping Weight:||10.22 lbs|
|Manufactured By:||Chapin (Mfg. Number: 61800)|
The Chapin Professional 4 Gallon backpack sprayer 61800 is the pro's choice for larger spray jobs.
- Over-sized filler cap that makes filling the tank easy with less spilling.
- Large capacity 4 gallon tank.
- Carrying straps for fatigue-free and hands-free operation.
- Internal 4 position spray valve allows for expert pressure control from 15psi to 60 psi.
- Positionable pump handle allows for right or left hand use.
- Reinforced hose with extended wand and adjustable nozzle allows for spraying a fine mist to a coarse spray.
- Heavy-duty poly construction.
- VITON chemical resistant seals that ensure years of protection and resistance to wear and tear.
(Originally sold as model #6148)
See all 30 reviews »
32 of 32 people found this review helpful:
Chapin Pro Series 4 Gallon Sprayer
By Jeff in Detroit, MI on 05/19/2009
I love this Chapin Pro 4 gallon sprayer, it has been the best one that I have found. I have used a lot of sprayers,and this one has been the best by far!! Only thing I would like is the option to add an extension to the wand.
15 of 16 people found this review helpful:
Makes quick work of a distasteful chore
By Thomas in Midway, GA on 05/24/2013
I live in coastal GA, which means an unrelenting assault by palmetto bugs (giant cockroaches for those fortunate enough not to know), sand gnats, and ants. Before buying this sprayer it took me 3-4 hours to lay down a barrier around the house, garage, and workshop as well as the interior of the garage and workshop (I forgot to mention the nasty spiders lurking in those places). My smaller sprayers have limited pressure, making it a real bother getting around the shrubbery. The frequent need to refill chewed up a lot of time as did that to set it down and pump it up. From start to finish I got the job done in a little over an hour with this sprayer. I had to refill only once, and the pump lever let me effortlessly maintain maximum pressure. The sprayer delivers a wide stream, even into the rafters. The only problem I had (and it is a minor one) was getting the thing on my back when filled. Next time I'll set it on a table first. The rig is surprisingly comfortable once the straps are adjusted - even with a bad back I barely noticed the weight. There is a right tool for every job. For my money, this is precisely that.
15 of 15 people found this review helpful:
By Dewayne in Bristol,Va on 06/11/2012
This Pro Series 4 gallon is a nice unit and it makes quick work of my needs when spraying my property as i use it for weed and grass killer. Saves me time from doing refill and the adjustable pressure is a nice feature. I don't think anyone could go wrong selecting this unit.The wand is easily adjustable and the hand pump is both very accessible and effective. There is great filtration to help keep junk from getting into the tank or wand and it's easy to clean when done. I've used it both full and with just only 2 gallons and have been delighted with the results from using the Chapin.
9 of 9 people found this review helpful:
4 gallon Backpacl
By Matthew in CA on 12/08/2010
The backpack arrived very quickly and I was very satisfied with the transaction. Very convenient to wear on the back, pump works great, would never want to use a hand held one again! Great product.
7 of 8 people found this review helpful:
By E in Houston, TX on 03/28/2011
Great Sprayer. No problems at all with it. Very pleased with the sprayer and the seller.
Easy to use
By Eric in York, PA on 04/14/2017
This sprayer is easy to use and assemble. The system stays primed and is easy to pump with the lever at your side. You can select which side the pump lever is on when you assemble the sprayer.
0 of 1 people found this review helpful:
4 gallon backpack #61800
By Paul in St James City on 11/17/2016
have not used yet. product is as described n looks very usuable was delivered fast. quality looks to be very good. price is very competetive. ready to use soon as i get over a bug in my system
By Ian in Newnan, Georgia on 08/31/2016
Came in a box that had been re-packed, re-sealed with tape, and had crushed corners. No manual in the box and the parts kit didn't seem to match the sprayer. BUT ... it's an excellent sprayer, much more convenient and efficient than a 2-gallon hand sprayer. Very easy to use and a good throw by the wand. However, if you haven't hauled a 4-gallon backpack sprayer, remember that four gallons weighs about 35 pounds. Get a helper to help you fit the backpack and get used to walking around before you get into soft ground near your pond! Recommend this sprayer.
By Clark in Waddell, Arizona on 06/07/2016
Great product works perfectly. Company noticed I had an error in my address and quickly contacted me to clear it up before they shipped. Once it was straightened out they shipped immediately.
1 of 1 people found this review helpful:
Great deal on a reliable rig
By Randolph in Virginia on 04/25/2016
Not the most expensive sprayer out there, but it definitely gets the job done. Most of the parts are replaceable, which makes it well worth the investment. It's pretty tough, so as long as you treat it right I doubt replacement will happen often. Doesn't take much to pump it up and tackle a large job, and it handles well on your back with a full tank. It took a minute to figure out how to switch out nozzles, but then again I didn't read the directions... So far I've run 6 full tanks through it and haven't had a problem.
2 of 2 people found this review helpful:
AWSOME BACKPACK SPRAYER
By Steven in Alma, Arkansas on 03/23/2016
The Chapin Pro Series 4 Gallon Backpack Sprayer #61800, is a quality constructed sprayer !!! Pump works flawlessly an holds pressure !!! A breeze to operate !!! GREAT PRODUCT HIGHLY RECOMMENDED. 5 STARS !!!!
1 of 1 people found this review helpful:
By Keith in Houston, TX on 04/17/2015
I was more excited than I should have been to receive my sprayer. I filled it up with 4 gallons of organic fertilizer and was able to feed my plants. It worked flawlessly. I've only used it once so I cannot comment to durability but it appears to be a well made piece of equipment that should last many years.
2 of 2 people found this review helpful:
Ahhh, no more refilling
By Pierre in Pembroke Pines, FL on 11/13/2014
Used to use a 1.5 gallon hand held pump sprayer and had to refill 2-3 times to treat all the outside walls and soffit. Now, just one filling works. Not only does that save time, but with the ability to pump/pressurize as you're spraying, no more stopping to put the sprayer on the ground while I pump it up. Cuts the time to treat the house in half!
7 of 7 people found this review helpful:
By Matt in Charleston SC on 10/25/2014
Great back pack sprayer. Spray tips are quality, as are the straps and the wand. Did NOT come with internal pressure regulator .. still manageable with the hand pump for the experienced user.
4 of 4 people found this review helpful:
just started using it
By in raleigh NC on 09/01/2013
Great, easy of assembly, mixing (large opening at the lid), and pump and spray. Creates a much finer mist type spray so coverage is much greater with less loss of volume in tank.
Have a question about this product?
Ask our product experts...
Ask a Question
QHow do you add pressure to the backpack sprayer?
Most sprayers have the pump on the lid.
AHand held sprayers have the pump on the lid that you hold. If you notice in the picture there is a rod that extends from the bottom of the pack. On backpack sprayers since you where it on your back, the rod extends out from your side and you pump the rod up and down to pressurize the tank.
11/15/2012 Chris from Augusta
QDoes is drip/leak?
Almost every sprayer i've had leaks or drips chemicals in my trailer. Makes cleaning out the trailer rather pointless. Will this one leak if I leave chemical sitting in it, and it sitting in my trailer? Thanks!
AYou cannot store chemicals in sprayers as it will weaken the gaskets and other portions of the sprayers and cause leaking. Leaving chemicals in sprayers for more than 24 hours at a time will also void any and all warranties offered by the manufacturers. For short term use (for a few hours) stored product in the sprayer should not leak out as long as the sprayer is kept upright.
QHow far does the Chapin Slide Pump Sprayer reach? A second story home?
AThis backpack sprayer only reaches about 10 feet high. For higher areas we recommend the Chapin Slide Pump Sprayer which can reach up to 30 feet high. We also have a video that shows the slide pump sprayer in action on the slide pump product page.
QHow far will the Chapin Pro Series 4 Gallon Backpack sprayer reach horizontal (craw space)?
AMost hand pump sprayers including the Chapin Pro Backpack sprayer will only spray about 10 feet at the most from the end of the sprayer wand. If you need to reach further, we do sell the Chapin Slide Pump Sprayer which can reach up to 30 feet away.
01/16/2013 S from Dallas Texas
QHow much does the empty Chapin Pro Series 4 Gallon Backpack (#61800) sprayer weigh?
AThe Chapin Pro Series 4 Gallon Backpack (#61800)sprayer weighs around 10 lbs empty.
07/18/2013 Steve from Green Bay, Wi
QIs the Chapin Pro Series 4 Gallon Backpack a diaphragm pump or a piston pump?
AThe Chapin Pro Series 4 Gallon Backpack is a Piston Pump.
04/02/2013 Shane from Freedom,ca
QDo you guys sell the plastic replacement wand for the #61800 model?
AWe do sell the replacement wand for the 61800. It is part number 6-8101.
02/23/2015 Benjamin from Az
QIs the Chapin Pro Series 4 Gallon Backpack (#61800) generally compatible with both insecticides and herbicides?
I am interested in spraying my weeds and doing my 2-6 month insect barrier sprays with this unit, I noticed it has Viton seals, does that mean it's pretty much generally compatible with most of the insecticides and herbicides available here on DMOPC?
AYes, the Chapin Pro Series 4 Gallon Backpack (#61800) can be used with both insecticides and herbicides. Be sure to triple rinse and thoroughly your sprayer in between products though.
05/26/2015 Mike from Murrells Inlet Sc
QIs the pump handle for the right hand, or left.
AThe pump handle can be changed on the Chapin Pro Series 4 Gallon Backpack sprayer. It can go on either the left or right side depending on which hand you use more frequently.
05/19/2016 Gloria from Crystal Lake, Il
QIs the Chapin Pro Series 4 Gallon Backpack (#61800) good for spraying near flowers?
I want to spray weeds among flowers in my flower beds, so I need a very precise spray so as to get close but not hit flowers. Is this sprayer good for that?
A Yes, the Chapin Pro Series 4 gallon backpack sprayer is a very good option for precision spraying. There are different tip sizes available, such as pin stream, fan, fine mist and coarse stream, to give you the best and most accurate spray depending on what you are wanting to do. There is also an internal 4 position spray valve allows for expert pressure control from 15psi to 60 psi.
Yes, the Chapin Pro Series 4 gallon backpack sprayer is a very good option for precision spraying. There are different tip sizes available, such as pin stream, fan, fine mist and coarse stream, to give you the best and most accurate spray depending on what you are wanting to do. There is also an internal 4 position spray valve allows for expert pressure control from 15psi to 60 psi.
10/24/2015 John from Davie
QCan you use a Chapin Pro Series 4 Gallon Backpack to spray a paver sealer?
I would like to use the unit to spray a water based paver sealer on my patio. I want to make sure this unit can also handle that type of product. And do you recommend the piston unit for it? Also, do you recommend a particular setting for spraying the sealer?
A No, a paver sealer cannot be used inside of a Chapin Pro Series 4 Gallon Backpack. You may want to contact Chapin directly for advice on which sprayer would be suitable for applying the specific product you have. You can reach them at 800-950-4458.
No, a paver sealer cannot be used inside of a Chapin Pro Series 4 Gallon Backpack. You may want to contact Chapin directly for advice on which sprayer would be suitable for applying the specific product you have. You can reach them at 800-950-4458.