Niagara 4 Gallon Backpack Chemical Sprayer Review 

I just bought this yesterday with the 25% off coupon. I'm working with 10,000 sq ft also. Thanks for reviewing this.

Great review! Subscribed

I just picked one of these up, I have a pressure washing job to clean a lot of play ground equipment, plan on using this to treat everything with a light bleach mixture. Seems this will work pretty well for what I need to do! Thanks for the review

Good review - and probably should save my comment as will be testing the 90 day warranty. Pressure buildup was an issue from the beginning and initially thought was user error as noticed the seal on the cap displaced/pinched when putting it on and tightening. That is something to look for. After correcting, pumped to pressure and lasted about 10' of wall, then wouldn't pressurize any more. Couldn't feel resistance on the downstroke but I do see the piston going up and down through the white plastic. Perhaps a seal or ring in the pump? Had 3 gallons of chemical mixed up so ran out and got a cheap 1 gallon sprayer just to use up. Will see how the warranty issue resolves as must be online and warned at the register that cannot be returned to the store if the box is open - plus written on the receipt. Great that you showed the pattern. While you did a yard spray - another use is fogger which gives a phenomenal spray pattern. For mosquito control it is important to get the underside of leaves. This is a very inexpensive DIY. I mixed Bifen I/T 7.9% and taped the wand to the blower (3 areas with green painters tape) with the tip of the wand discharging into the blower airstream. Didn't have to worry about the blower trigger on my Ego Blower as it has a round dial for a constant stream. Used my free hand with the wand trigger to release the chemicals. Worked great!. Also did a full yard spray with the blower to saturate into the grass, as it controls other insects including lawn moths/cutworms.

At 1:05 of the video there is a baggie on the floor with a plastic gasket or screen. It isn't mentioned in the video. Does this need to be installed on the sprayer? Thanks

My biggest complaint with this unit is the fact the pump handle doesn’t go all the way up for proper storage. It’s constantly sticking out, and gets in the way of things. Would NOT recommend. Just too many headaches with this one.

Mine leaks at the bottom of the exterior pump casing. Any fix for this?

Will this sprayer accept Teejet nozzles?

After reading all the comments, I guess I'll go to the depot and buy a real one. This sounds like trouble

I bought this sprayer recently and just put the pieces together that came in box unassembled to sprayer.. In your video at about 1:04 min you show the nozzles, handle and manual plus the little bag with the m5 bolt, washers and flynut + it shows a 2" dia round plastic cap like object with a round spring in it. ?? Where did you install that? As the manual does not address where to put it And you didn’t show in video where you installed it. ? At back of manual at page 10 &11 parts# 30 & 31 it seems to show those 2 pieces. I would assume that they are already installed under the pump cylinder (#29), if thats what they are for. (Are they just extra for future repairs??) Whats your thoughts. I left email at HF main office

I think it will last a very long time plastic parts are extremely common on most modern sprayers

I used mine once and it stopped pumping!!!!cnt get it started again and this item is non refundable or non exchangeable

Mine i pump for 10 minutes and nothing happens no clue whats wrong. Everythings tight plenty of water, nothing

Didn't solve my problem