VEVOR Air-Operated Double Diaphragm Pump 1 inch Inlet Outlet Aluminum 35 GPM Max 120PSI, Nitrile Diaphragm, QBY4-25L-1inch-35

Works good needs a pre filter for pumping used waste oil

I have a long asphalt driveway that I have been sealing with the asphalt sealer from Lowes and Home Depot. I thin the sealer with 25%-50% water depending on the brand of sealer, and spray with a soap nozzle on a pressure washer wand. Too thin and it dribbles a bit, too thick and it splatters, but this pump has been very reliable. With all the trial and error, this pump has been the most consistent part of the project. Doesn't use too much air. Not too loud. Sometimes when I stop the spray, the pump bleeds air so I added a ball valve to the air inlet.

Received pump tried to use wouldn’t work found misplaced o-ring replaced o- ring seems to work fine.

It seems not rugged enough. Stopped working when use the first day.

Purchased this to move high-viscosity cable pulling lubracant (25,000–40,000 cP). Does the job well with 10' length on suction side out of 55gal container. Installed a couple of ball valves to control. Works with pancake compressor as well, but can move more with larger compressor.

These pumps are really dependable and very well priced. I have been using them for several years and have had nothing but good results.

For a small pump it works very well. I pumped tire ballast out of 2 tractor tires , and refilled 1 tire , it did it with ease. I was very happy ,for an inexpensive pump it worked great.

so far so good 25 gal of hyd fluid fairly fast