Husky 716 Diaphragm PumpThe Husky 716 air operated diaphragm pump features an external controller for remote control capabilities. Center and end porting No mechanical seals which causes fluid leaks or failures Runs quietly at less than 85 dBa with easy to use remote muffler capability for even lower noise levels Easy to service air valve and ball checks 3 4 in (19. 05 mm) center and end porting No seals to leak or fail Quiet running less than 85 dBa with easy to use remote