Forum Title: Pressure assist pump
Since my pump is an "on demand" constant pressure pump, can I reduce the pressure by reducing the line voltage to the pump motor? Im looking for an alternative to a pressure reducing valve....
Category: Plumber Post By: ELSIE POWERS (Fort Worth, TX), 05/05/2017

What constant pressure system do you have? The Pentek Intellidrive and Franklin SubDrive systems can increase/decrease the pressure by adjustments at the pressure sensor. If you reduce the voltage to the motor, you will achieve nothing except end up with no water at all.

- LEO BREWER (Lehi, UT), 09/07/2017

You can change the speed of a motor by varying the cycles from 60 to something else. Reducing the voltage would lead to a burned up motor. The systems Matt mentioned use the variable cycle method. A transducer measures the pressure which tells the drive what to do to keep it there. A constant pressure valve will totally confuse a variable drive. But for a regular pump they work great.

- TERRY KLEIN (Racine, WI), 10/08/2017

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