18V ONE+™ 4 Gal. Backpack Chemical Sprayer

Model: #P2840 | Home Depot Sku #: 1002832205

Large 810e5dbd 6167 4e56 beaa 35f9c3e3ae04

Large eead8228 612c 493e a497 56dd2c2d5434

Large e89a7629 ea07 4c4a 9540 0ae1b3ebc4e1

Large 1b918f6e d689 4b25 88b0 b44ee1dcbebe

Large 6385c68d 4436 40b7 bbff 16243fbf1566

Large b8dd4708 adb0 4a49 bca7 c23b999dac46

Large 9fa01132 5d19 477c 94ba ebb50bc74b77

Large bb486689 bc67 43ad ba4e 1fb1f0c22b16

Large 139eeaaa 9f55 4943 b768 9ad4711b466a

Large 89abae5a a979 44b2 8fe5 1897c19d751a

Large 1ac1e30a df71 4009 b45c a31ba125ed5d

18V ONE+™ 4 Gal. Backpack Chemical Sprayer

18V ONE+™ 4 Gal. Backpack Chemical Sprayer is rated 4.5 out of 5 by 219.

Rated 1 out of 5 by Keith T from So close to being a great product I purchased this sprayer for my landscaping company to spray weed control with. The pump itself ran great! I loved the constant, consistent pressure. I felt that we used less product and got better coverage by having consistent pressure. Unfortunately the hose from the tank to the wand ruptured on the second tank completely soaking me with chemical. The hose was a very thin rubber/vinyl material that had no business holding pressurized liquid. I ended up returning the sprayer. I’m sure eventually they’ll figure it out and use a higher quality hose but until then you’re wasting your time and money buying this sprayer.

Date published: 2018-07-20

Rated 1 out of 5 by CyMomus from Terrible Product, beware! I bought one of these backpacks three weeks ago, I really wanted to like it, I owned several other + one products, the backpack worked for about 3 minutes before it failed completely. I returned it to Home Depot the following morning and they didnt really want to accept it. They finally agreed to give me my money back. The next day I gave all of my ryobi tools away as I have lost all confidence in this product. Again I wanted to like the backpack and had several hundred dollars invested in ryobi but this failure and Home Depots response were unsettling at best. I would love to give a rave review but facts are facts. Buyer beware!!!!!!!!

Date published: 2019-03-25

Rated 3 out of 5 by Captain Al from Design Flaws reduces rating from 5 to 3 stars This sprayer would get 5 stars if not for 2 design flaws. 1) the inside diameter of the screw on lid is too small, so the filter basket and seal get stuck in the lid. Every time I use the sprayer the gasket and basket get stuck in the lid. 2) there is no sump in the tank, and the feed tube is not secured so it can move to high spots in the tank. The result is that the feed tube randomly moves to high spots in the tank, and the tool stops spraying even though there is plenty of liquid in the tank. This has been mentioned in many reviews. A chest strap between the two shoulder straps would be really helpful and make the unit more comfortable. Especially since it weighs over 40 lbs when filled to capacity.

Date published: 2018-10-05

Rated 4 out of 5 by Unclegadget from Getting the job done! I've used this sprayer on a couple of occasions, and it works great. The only gripe I have is that it works better with the battery that came with the kit. What I mean, is the 2Ahr battery that came with the sprayer, will lock into the sprayer securely, and honestly, it's more than enough power to run the sprayer for hours. I had a fully charged 4Ahr battery from a battery kit that I tried to use the first time I used the sprayer and it didn't lock in, so every time I leaned back, the battery would come loose. I'd have to reach back and push it back into place to get the pump to power back up. with this one minor battery issue, this thing works great!

Date published: 2018-06-11

Rated 5 out of 5 by Morrow from Great sprayer I am pleased with the sprayer ,it has good pressure , looks like its built sturdy straps are decent, better than others(competitors) i know the battery should last ryobi has good batteries.the only thing that they could improve would be the pick up tube just floats around. So if your sprayer is not spraying and straining to spray. Its the pickup tube sucking in air. What i did was tie a fishing sinker to the bottom of the pickup tube and it works great. They should fix it to the bottom , or use some kind of clip or suction to keep ot there. Other than that im happy. And it has a 3 year warranty.

Date published: 2019-02-16

Rated 5 out of 5 by Commsih from Where has this been all my life? I bought this sprayer a couple of weeks ago. I was a little leery because of the price, but I knew there had to be a better way than using pump sprayers. Jackpot! I have a large area in my yard that was recently cleared via weed eater. The weeds are now growing fast because of the warmer weather and recent rains. I strapped the RYOBI backpack sprayer on and "went to town." I was finished in less than 30 minutes. The element I liked the best were how strong and powerful the sprayed worked. I was able to reach areas over 5 feet away from were I was standing. I would recommend this 18V sprayer to anyone who is tired of the pump backpack sprayers.

Date published: 2019-05-14

Rated 5 out of 5 by Kaymo from Simplified my life immensly I have an acre and a half of land and over the years i have used a 2 gallon pump sprayer and it takes me half a day to spray for weeds, This little baby is AWESOME! i was done in less than an hour. The pressure is good and the nozzle easy to adjust. I am so glad to find this product this year! I will certainly be taking care of this useful tool. I made sure to rinse it out and spray it with clean water and then cleared the nozzle before storage. I own several RYOBI products and am a RYOBI Girl from here out! Thanks!

Date published: 2018-03-16

Rated 4 out of 5 by Michaelfl from Redesign the wand to metal I like the unit but I wished it had the metal wand and nozzles like the hand held unit.

Date published: 2018-02-22

18V ONE+™ 4 Gal. Backpack Chemical Sprayer Reviews - page 2

To easily distribute herbicides, pesticides and fertilizer in your yard, the RYOBI 18-Volt ONE+ Backpack Chemical Sprayer is the perfect tool. With no pumping required and a translucent 4 Gal. tank, monitoring fluid levels is simple. This Chemical Sprayer has a nozzle that adjusts for multiple spray patterns and the chemical tank cap doubles as a measuring cup. For additional convenience and the tool comes with a 2.0 Ah Lithium-Ion Battery and is backed by a 3-Year Warranty.

Add to Wish List

Product Videos

Spays 40 Gallons Per Charge*

No Pumping Required

Mesh Back & Adjustable Shoulder Straps

Adjustable Nozzle & Flat Fan Nozzle

Translucent Tank For Easy Fluid Level Reference

Power Source: 18V Lithium-Ion Battery

Tank Size: 4 Gal.

Pressure: 60 PSI

Tank Material: High Density Polethylene

Hose Length: 4 ft.

Nozzles: Adjustable & Flat Fan

Weight: 4.5 lbs.

18V ONE+™ 4 Gal. Backpack Chemical Sprayer

Spray Wand

Replacement Seals

Battery Lid

Adjustable & Flat Fan Nozzles

18V Lithium-Ion 2.0 Ah Battery

18V Lithium-Ion Battery Charger

Operators Manual

18V Backpack Chemical Sprayer - Model p2804

P2804_107370001_354_trilingual_04.pdf
Published: 01-18-2018
Filesize: 2.23 MB

P2804_107370001_503_Insert_Sheet_trilingual_01.pdf
Published: 12-01-2017
Filesize: 210 KB

P2804_107370001_354_r_07.pdf
Published: 11-16-2018
Filesize: 934 KB

18 Volt Lithium-Ion Battery Pack - Model p102

P102_P105_184_trilingual_06.pdf
Published: 08-04-2017
Filesize: 335 KB

18V Dual Chemistry Battery Charger - Model p118

P118_165_trilingual_04.pdf
Published: 07-19-2018
Filesize: 2.06 MB

Click the link below to access outdoor products replacement parts schematics and order parts online.

For those customers that prefer ordering by phone, simply contact the Ryobi master parts distributor at toll free 1-877-545-4110, and place your order over the phone.

Visit Ryobi Lawn & Garden Parts Store