- Pneumatic double diaphragm pump, 1-1/2 inch inlet and outlet DN40, polypropylene body, 35GPM and Max 120pSI, chemical pump bleaching oil transfer

We use these for commerical use to pump water, soap solution, diesel, and thick motor oil. its slow pumping oil but oil is hard to pump. water, soapy water, and diesel pump easy and fairly quickly we use the 1 1/2 inch pump but use 1 inch camlocks with 3/4 hose for easy priming the pumping over long distance 25 to 50 feet and they self prime. requires your own fittings so plan accordingly. Pump uses an air compressor set at 40 psi but adjust up or down for desired flow. first one lasted 2 years commerical use. have bought 4 total. no pressure relief so care is needed not to dead head. but seems to just stop pumping when this happens. rated high on my approval list of pumps. Easy to use and dependable.

air pump works well and does the job. The price is right.

Absolute junk 5/6 times we used it and it blew completely apart down the seams

This Pneumatic double diaphragm pump is pretty well made. It does the job well and I like the fact that they include a video of it actually being assembled. There are many benefits for a pump like this. I like these types especially because you can get the pump close to the liquid source but have the pneumatic compressor far enough away that you can’t hear it. Or you can put it in a sound dampening box. Either way you can make it very quiet where the pumping is happening. It also can be used for many different liquid chemicals. So far, I think this one is pretty impressive.

This pump is well made. It has worked great for me. It is fairly lightweight and definitely doing the job. Love it!