425 4-Gallon Piston Backpack Sprayer, Wide Pressure Range up to 90 psi

I used this all last summer to spray fish and seaweed based fertilizer around my 2 acres of orchard and gardens. It works well for me. I bought a longer tube for the wand so I can reach higher in my trees. The pack is reasonably comfortable to wear, even when full because it is well balanced and the handle for the pressure pump is easy to access when walking. When spraying my trees I tend to lock the trigger in the ON position and use the pressure pump to maintain a constant pressure. I find it very easy to use. The only problems that I have had are that the soft plastic tube came loose from the main tank and the trigger sometimes doesn't work correctly when locked in the ON position for too long. The plastic tube coming loose caused my pants to get wet because the fluid started coming out through the bottom. It was an easy fix and just required adjusting the tension on the clamp holding it in place. I think it came loose partly because I had put too much pressure in the tank. I deal with the trigger problem by sometimes releasing the lock when walking around and it seems to be fine. Even with the small problems that I had I still love this unit and am glad I bought it. I would certainly buy it again if I needed a second pack.

Good sprayer

I wanted a sprayer similar to what the pest control companies use, and this meets the criteria. It was easy to unpack and get started with. The pump arm works great. It is so nice to be able to pump a sprayer without having to put it on flat ground. And I do not have to pump it as much as one of those cheap sprayers that you carry and have to place on the ground to pump. I can keep my spray pattern consistent by quickly and easily doing one more pump using the arm, which really speeds up my work. Only time will tell how well it holds up, but so far I love it. Well worth the money.

It works well, and I left off the 5th star only because the straps don't have a chest-level cross-latch. Some might find this picky, but when you have 4 gallons of chemicals on your back, that weight tends to pull the backpack off your shoulders. As a 5'3" tall woman with good upper body strength, it adds stress to my back. My solution was to hand-fashion a cross latch with Velcro and nylon strap. Problem solved Otherwise, It works like a charm. + I like the fact that the gallon measurements are in raised in the plastic itself. It won't wear off! + The pump is easy to work, and I find that as I walk & spray, its easy to keep the pressure for continuous spraying. + It has a nice screen / filter at the opening. Just unscrew the top, fill with chemical(s), replace the screen/ filter, fill it with water from the hose, and you're good-to-go. Sometimes there's debris in water lines, and the screen/filter is the same heavy duty material found in the backpack itself to prevent those particles entering your water reservoir and, subsequently, clog the tube system . + I really like the base, designed to keep it upright, even on uneven surfaces. Since I'm short, I can set it on a trash can, add chemicals and water, and just step into the straps and hoist it onto my shoulders, without stressing my back (by lifting it from the ground up to my shoulders). ... .The base keeps it steady, even when I'm not graceful in hoisting it onto my back! I've been using it for about 3 months now, and it's so easy, and I don't get tired (as I did with the smaller, hand held type sprayers), so I find I use it much more often, and the weeds don't get ahead of me. I would buy it again, for sure. Hope this helps --- Leslie in East Tennessee

Purchased two, one for house, one for farm. One worked perfectly, the other was broken (noticed a patch job on bottom of box after opening) and leaked from bottom without getting to the end of the hose. Contacted seller asking for replacement or parts to fix, told us we were past the 30-day return by one week. Even after pictures were sent clearly showing damage.

I bought this for spraying weeds in the cemetery at my church in Dallas, GA. There is a weed problem on the graves and in the spots where it is difficult to use a weed eater. You walk, pump and spray and it does a great job of saturating the weeds and the wand makes it easy to hit the right spots. The large lid on top makes it easy to fill with water and then add the herbicide. The traps are wide enough and adjustable enough to make carrying the full sprayer easy. Clean up is easy at the end. Initial assembly takes about 5 minutes. You won't even need to look at the instructions. We now have 5 of these at church and they make spraying the cemetery and weed outcroppings in the parking lots easy to deal with.

Great spray easy pump

Sprayer works great. Fill it on a bench or table and slide it on. It fits comfortably, and you never have to take it off until you are done with the entire contents. Great pressure easily maintained with a gentle, constant pump with one hand while directing the spray with the other. Can’t find anything I don’t like about it.