1gallon of water per 1000SF is a good rule of thumb for coverage. If you have 3kSF I would say grab the 4 gallon.

 

4 gallon

 

Save your sanity and get the 4 gallon.

 

Get the 4 gallon. It easily accepts TeeJets. Another member here modified his 2 gallon wand for a TeeJet but I think he still ran into issues. My grass is 3k, too, and I use a 4 gallon Ryobi for everything, supplemented with a 1 gallon pump to spot spray.

 

I use the 4 gallon with a TeeJet.

It's actually my second Ryobi 4 gallon. The first one I used for my reno with gly and decided to keep it dedicated for gly. I can't compare to the 2 gal as I never tried one, but the 4 gal is an excellent piece of kit.

 

Great to hear the suggestions, and seems everyone "the team" is in alignment regarding the 4ga haha. I'm in the same boat as I use the 1ga for spot spray for things like fence lines or killing the neighbors weeds with round-up (when they encroach under my fence), etc.

I also appreciate the earlier call-out around using 1ga/1k sq ft as a rule of thumb too. Thanks!

 

I have the 4gall Ryobi. WARNING, there are 2 versions of the 4 gallon out right now. I would personally get the Version 1 linked below.

The Version 2 you do gain a flow control and is sleeker looking BUT, you sacrifice A LOT of comfort and build quality. I bought the Version 1, the motor failed within 180 days and returned it. I got the newer Version 2 because it had a flow regulator on it. I brought it home and took it out of the box. Immediately put it back in the back and took it back to get the older Version 1.

Version 1: has an aluminum bacpack frame that the straps are built into and it keeps its off your body. Straps are mounted to the frame and not to the tank. If you are adding blue dye to your spray, you dont want the excess getting on your back or chemicals in general when walking around. The lid and threads are also MUCH higher quality and courser threaded for easy on and off. Frame also provides a sturdier base for sitting down.

Version 2: does have a flow regulator. BUT, no frame and the tank sits right on your back. Straps are mounted to the tank with tabs that I 100% see braking down the road. Narrower base for sitting on the ground and maybe tipping over. The lid is finer threaded and just feels reallly cheap about using the Version 1 for a year.

Version 1 https://www.ryobitools.com/outdoor/products/details/18v-one-plus-4-gal-backpack-chemical-sprayer

Version 2 https://www.ryobitools.com/products...s/18v-one-plus-4-gallon-backpack-chemical-sprayer-with-2ah-battery-charger-gen2

Also, FWIW, if these things break, push to get a new one, the local repair place quoted me 8-12 weeks to repair pump, IF Ryobi even had one in stock. Buy the warranty for like $15 for 2 years. #Worth

 

Also, FWIW, if these things break, push to get a new one, the local repair place quoted me 8-12 weeks to repair pump, IF Ryobi even had one in stock. Buy the warranty for like $15 for 2 years. #Worth

Why did the Ryobi 3 year warranty not cover the pump? https://www.ryobitools.com/support/warranties

 

Also, FWIW, if these things break, push to get a new one, the local repair place quoted me 8-12 weeks to repair pump, IF Ryobi even had one in stock. Buy the warranty for like $15 for 2 years. #Worth

Why did the Ryobi 3 year warranty not cover the pump? https://www.ryobitools.com/support/warranties

Oh it did. But, Ryobi wanted to repair it at a local repair shop. The repair shop quoted me a 8-12 week turn around time to get the motor replaced. And that was ONLY if Ryobi had the motor in stock, which they had been backordered.

The Home Depot warranty let me return it straight to Home Depot. Either that or the Manager just let me take it back and gave me a replacement.

 

@jsams22 - it seems the Version 1 is now completely out of stock, so missed the boat on that given other house priorities. :roll:

For Version 2, with the flow regulator, I think I read it can go between 60-90 psi. At 1ga/1k sq ft, do you have happen to know which psi setting you would set it too? Seems I'll be stuck with this and hoping I don't get blue marking dye down my back and shirt. Thanks!

 

I have the new Ryobi 4 gallon and I like it a lot. To get the 1 gallon/k rate, I turn it on highest pressure and walk at a normal speed. I am 6-1 and it works out about right. No issues with leaks or discomfort yet, but have only used it once thus far.