190328 Backpack Sprayer, 4 Gallon, with Internal No Leak Pump Design Delivers 150 PSI

If you're wondering if buying this backpack sprayer is worth it, let me make it easy on you - Buy it, This sprayer is worth every single penny. Between weeds in flower beds, in the expansion joints in my driveway, and in brick sidewalks with lots of small gaps, I have to spray weed killer every few months and it is a hassle. I bought this to replace a 1 gallon pump that I had been using and would have to refill 3-4 times. The 4 gallon tank and the hand pump speed up work significantly. It is great quality - well made and feels sturdy. You can tell that they didn't skip any corners. The steel frame allows you to set it down easily, but isn't too heavy on your back. The straps and belts to secure it are very comfortable once you get it on. Even the screw on lid is solid and well made. It takes the pressure off of your back not only from not having to carry a smaller sprayer, but also because the sprayer heads spray as far as you need without having to bend over. If you have a direct stream you can spray it precisely, or a spread out stream you can easily pump while you spray a larger area. The different sprayer tips work extremely well and haven't clogged once. It sprays more than other sprayers I have used (which I personally like) but there a flow limiter attachment if you want to use it.

I have 3 different size tank sprayers (1,2,3 gallon) and was tired of carrying them around the farm. We have a 300 ft barn lane and 400 ft drive with a half circle turn around with gravel surface. I use 6 gal of spray to keep weeds/grass out of drives. We have 3 pastures totaling 20 acres surrounded by woods and 26 acres of woods in a woodland management plan. I needed a sprayer that I could use to kill invasive species along the pasture edge and in the woods. This sprayer does the trick. It worked perfectly right out of the box. The wide mouth on the tank with a screen allows you to pour chemical easily into the sprayer and the screen catches anything that might fall into it. I was able to take water, chemical and sprayer in a trailer to the back of the property, mix it the field and spray the pastures edge. I used 11 gallon of chemical first time I used the sprayer and it worked great. No leaks, 5 or 6 pumps pressurizes the tank with excellent spray coverage. With the wand I can reach 10 ft high and the spray is another 3 ft so I can reach places I couldn't reach with the hand held sprayers. Having the sprayer on your back is much easier than carrying around a tank and having to stop to pump 12 or 15 times to keep good pressure. I thought I would use more chemical due to the excellent spray coverage but I was pleasantly surprised that I used less chemical than before. I was able to spray about 1000 ft of pasture edge with the 11 gallons of spray. We have serious problems with Chinese bittersweet, grapevine and privet so I use Crossbow in the sprayer. Clean up was easy, the filter on the wand is easy to get to, the nozzle is easy to remove. The one thing I can't use it for is walking thru brush to get to invasive plants that are well hidden but I knew that before I bought this sprayer. With a tank full of spray on your back it is hard to maneuver in close quarters. If you are looking for a good sprayer, at a fair price that does the job intended then look no further than this sprayer. It is well worth the investment. One caveat is that any piece of equipment is only has good as the maintenance so I would encourage you to clean after every use, use vaseline on the o-rings and take care of the equipment you purchase.

Such a GREAT sprayer. Easy to assemble. Put the pump handle on either the right or left side (great to have this option.) For general spraying, a cone-shaped mist comes out strong. This backpack sprayer costs more than what the big box stores charge, but the quality is so much better. Highly recommend!

I’ve been using this FIELD KING 4-gallon backpack sprayer for about 10 months, and it works very well. Once on your shoulders, it pumps quickly and delivers a strong, adjustable spray, from fine mist to powerful stream, with pressure maintained easily every 20–30 seconds. The main drawback is the weight. Fully loaded, it’s around 40 lbs, which can be difficult for many to lift and strap on comfortably. I usually only fill it halfway to make it more manageable and even then will set it on my outdoor potting bench in order to strap it on with assistance of the bench supporting the weight. Overall, it’s a solid and efficient sprayer, but the weight keeps it from being ideal for everyone.

I have gone through quite a few garden sprayers over the years, but this four gallon backpack model is by far the best one I have ever used. The standout feature for me is the internal pump design. With my older sprayers, I would constantly end up with harsh chemicals leaking down my back, but this unit keeps my clothing completely dry. The padded shoulder straps and waist belt make carrying a full tank surprisingly comfortable, even when I am walking around the yard for an hour at a time. The internal agitator paddles are also a fantastic touch because they keep my powdered fertilizers perfectly mixed while I work. The performance is exactly what I needed for treating my large property. It pumps up to an impressive 150 PSI, which makes it incredibly easy to reach the higher branches of my trees without needing a ladder. Having six different nozzles included right out of the box gives you total versatility whether you need a wide fan spray for weed killer or a direct stream for bug control. The brass shut off valve feels very heavy duty and the lockable trigger absolutely saves my hands from cramping up during long jobs. If you do your own lawn care and need a reliable piece of equipment, I highly recommend picking this up.

Works fine. No leaks

Bought mine in 2019!! I use it two to three times a year to apply weed killer and wet and forget. I have never replaced a part or had even one tiny problem! Honestly, it’s the best money I’ve spent! I have a large property and I get everything done with three gallons! Put the sprayer on a counter level surface to fill it. Seal it up and then put it on straight from counter height so you don’t hurt your back. I’m 60 and it’s totally doable. I use 3 gallons at a time even though it’ll hold 4.

Only used it twice so far but it works awesome. Very comfortable backpack. Also comes with many different nozzles.

As described. Nice quality

After going through 3-4 different pump sprayers from Bunnings Australia, I found this recommended online from many US based websites. The sprayer came well packed and was easy to assemble, I was only required to add the Pump handle, attach the spray wand and the cone tip. Additional seals and spray configurations are also provided which is nice. The Instructions are well written and legible. I quickly added Round-up, detergent and some dye and was pumping and spraying my front and backyard in no time. There were no issues with leakages at all and the pump lever action is satisfying to use. Functionality: 5/5 Durability: 5/5 (Used twice so far, but it didn't blow the seals after use, which has beaten all the competition I've tried so far) Features & Accessories: 5/5 Honestly, this is the best spray I've used and is worth the investment. It looks easy to maintain and repair also. Don't bother with a el-cheapo that'll break after 1-2 uses.

No leaks, no dribbles

Very pleased with this sprayer. So far it has done all that I expected, and is a big improvement on my previous sprayer. To be recommended.

I have used this knapsack about 8 times now and I love it. I have used cheaper packs before that have failed after the first few uses, but this is still going strong. I use it pretty full and the hardest part is lifting it on my back. I usually place it on a short wall so I can slide it on more easily. Even with repeated use at max capacity, it hasn’t missed a beat.