How to Install an Air End Kit on Diaphragm Pumps | Video

Sandpiper Pumps demonstrates how to dissassemble and reassemble a Sandpiper metallic diaphragm pump (Sandpiper models S15, S20 or S30). This step-by-step tutorial includes the tools required to dissassemble the diaphragm pump, how to disassemble the diaphragm pump, what parts of the diaphragm pump to inspect, how to repair those parts, how to replace certain parts of the air end of the diaphragm pump, and how to reassemble the diaphragm pump.


Diaphragm pumps work much like a human heart. The diaphragms move away from the the central chamber, lowering interior pressure and drawing in fluid, then push back, increasing pressure and expelling fluid. One-way check valves guarantee that fluid flows in only one direction. This generates enough pressure for the pump to be used for cleaning or spraying applications. Due to their reliability, accuracy, and efficiency, they are often used for dispensing, filling or metering.

The air end kit includes a pilot valve, gaskets, O-rings, and bushings. For wet end kit replacement, watch this video.

The Sandpiper line of diaphragm pumps are suited for suspended solids and moderately abrasive fluids. Sandpiper diaphragm pumps are typically available with Kynar, Poly, Aluminium, or Stainless Steel bodies and Santoprene, Buna or Teflon diaphragms.