Our self-priming diaphragm pump features an all-bolted cast iron body and double nitrile diaphragms, sturdy and corrosion-proof, without leakage. Sealed ball valves and non-stall operation provides outstanding performance. It is perfect for transferring viscous and flammable fluids. Our top of the line self-priming diaphragm pump will ensure your operations are flowing smoothly. | Vevor | | Air-Operated Double Diaphragm Pump, 1/2 in Inlet & Outlet, Cast Iron Body, 3 GPM & Max 90 PSI | Blue | Best Buy