Efficient Air-Operated Double Diaphragm Pump For Petroleum And Low Viscosity Fluids - Happybuy 1/2 In Inlet & Outlet, Cast Iron Body, 8.8 GPM & Max 120PSI Review

The pump works although you will find it consumes a lot of air, this is my first time with a pump of this nature so I can't say that it is better or worse than other pumps in that area. The user manual is horrible!

It leaked at inlet base first off, bolts were loose so snugged them up and slowed leak but didn't stop, was able to still use it as needed it, can't fiqure out from parts list they sent with it to what parts i need to fix leak on QBK-15, I would guess there is 4 orings, seal or gaskets i would need but no part numbers. Should have did a check over of all bolts before using it so my fault. Pump seems like good quality but if can't fix leak with new parts or parts locally it would be a throw away

This pump worked well for us. We pump some fairly thick polymers and we use a portable gas powered compressor. It pumps about 10 gallons a minute of the really thick stuff (like Elmer's Glue) and about double that rate with the thinner stuff. Also, my air drier failed and damaged the pump. After much research I found that the air side rebuild kit is ARO 637434 Air Section Service Kit and available on Walmart. If for any reason this kit does not work as expected I will update this review.

Have not used yet, but holy moly. even the English instructions are "broken ".kinda hard to decipher. would also be nice if there were a customer service number for extra parts.should work well though, and really fast shipping!