Constant Pressure Systems

Do you often experience low water pressure with increased usage?

Private well systems are set to run at a certain pressure (typically 40 to 60 psi) and the water pump runs at one speed. With water usage, the pressure in the tank drops, and when it reaches the “low point” the pump starts up again. A standard well pump kicks on full blast until it shuts down. When it kicks on it draws about twice the amperage and slams the pump, motor, pipe and wire against the well casing.

Constant Pressure System vastly improves the above situation. In a Constant Pressure System the demand for water increases the pump speed and vice versa. The closer to the upper limit, the slower the pump will run, and the further away from it, the faster it will run. The pump only runs as much as necessary. The pump also gently shuts off, unlike the the abrupt functioning of a conventional system. This vastly prolongs the life of the pump by reducing mechanical stress.


Wash dishes, take a shower, water the grass, wash laundry all at the same time with no loss of water pressure.

Constant Pressure Systems are increasingly becoming the standard for domestic water systems. They are cost effective in terms of energy savings, lower maintenance and higher reliability. There is a significant energy savings because the pump only runs when necessary.
A Constant Pressure System is like cruise control for your water system. Up to 20% energy savings can be expected with a new Constant Pressure System.

It is possible in many cases to retrofit a constant pressure system without pulling your pump or changing the wiring to a three phase motor with a new wire. Many previously installed 3-wire or 2-wire single-phase systems can be upgraded to variable speed operation.
Most systems provide an LCD display providing real time status indication for monitoring and trouble shooting.
Call Mainline Plumbing today at 603-437-9114 to find out more about Constant Pressure Systems for your home.