Dultmeier Sales will be closed Thursday, November 26th and Friday, November 27th in observance of Thanksgiving

Dultmeier Sales will be closed Thursday, December 24th at 12pm and all day Friday, December 25th.
Normal operations will resume Monday, December 28th. We wish you and your family a very Merry Christmas!

Dultmeier Sales will be closed Friday, January 1st in observance of
New Year's Day

Dultmeier Sales will be closed Monday, July 5th in observance of Independence Day.
Normal operations will resume Tuesday, July 6th. 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!

How does a Diaphragm Pump Work | Video

All-Flo Pump Co. demonstrates briefly how a diaphragm pump works. This includes an in-depth explanation and description of each part and its usage. This is done using the All-Flo A-200.


A diaphragm pump is a type of positive displacement pump that uses two diaphragms, which move back and forth, to move fluid. While one side is filled with water, the other is filled with air - these two phases are refered to as "suction mode" and "discharge mode". During suction mode, one diaphragm moves towards the center of the machine. The check ball closest to the inlet valve is drawn towards the diaphragm, allowing fluid to pass into the diaphragm. At the same time, the check ball closest to the discharge valve is pressed up against a seal, closing it. This allows the diaphragm to fill with fluid. During discharge mode, the diaphragm is filled with air, which pushes it up and forces fluid out. The outward force of the fluid opens the check ball near the discharge valve and closes the check ball near the suction valve. This allows fluid to exit the discharge valve.

For a more detailed explanation of diaphragm pumps, click here.