$2500 FREE FREIGHT PROGRAM is for supplies, repair parts and whole goods. Tanks, pipe, sprayers and other large equipment are not included in this program. Applies to Continental U.S. ground shipments only.

Call for details! 1-888-677-5054

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Dultmeier Sales will be closed Thursday, November 24th and Friday, November 25th in observance of Thanksgiving

Dultmeier Sales will be closed Monday, December 26th.
Normal operations will resume Tuesday, December 27th. We wish you and your family a very Merry Christmas!

Dultmeier Sales will be closed Monday, January 2nd in observance of
New Year's Day

Dultmeier Sales will be closed Monday, July 4th in observance of Independence Day.
Normal operations will resume Tuesday, July 5th. We wish you a happy 4th of July!!

We are experiencing some technical difficulties on dultmeier.com and apologize for any inconvenience.
If you are running into issues, please phone your order in to 1-888-677-5054

Customer Pickup Orders: to help reduce exposure for our customers and our employees, if you are placing an order for in-store pickup please call in your order ahead of time or place your order online and pre-pay with a credit card. Be sure to let us know when you plan to arrive. We will have your merchandise ready for you and will greet you outside our facility. Thank you for your help!

Due to the impending winter storm Wednesday afternoon and Thursday, ASAP Express is cancelling all operations effective noon Wednesday until midnight Thursday.

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.