How to Stabilize the Pressure in a Shower Pump

A modern shower.
What You'll Need
Pressure reducing valve
New pump

Shower pumps are electric devices that are attached to a water line to keep the pressure of a shower steady. There are, however, instances where these pumps fail for one reason or another. Here are a few steps to try in order to fix a shower pump pressure problem.

Step 1 - Check the Storage Tank for Leaks

In order for the shower pump to have water to pump, the storage tank must be automatically refilling itself with water after it is used. Inspect the exterior of the tank for leaks. One easy way to tell if a pressurized tank is leaking is by turning off all of the fixtures in the house in addition to the tank itself. Then, watch the pressure gauge. If the pressure in the tank begins to fall, then the tank is leaking somewhere. Check the valves of the tank first. If no problem is found with the valves, the entire storage tank may need to be replaced. If the storage tank is a gravity-assisted model that is mounted in the roof, check for a faulty ball valve that may be keeping the tank from refilling.

Step 2 - Check the Pressure Rating

For a shower pump to function properly, it must have a pressure rating that is compatible with the pressure level that is in the water storage tank. Occasionally, the pressure in a storage tank will be too high for the pump that is connected to it. If this is the case, simply install a pressure reducing valve on the storage tank’s outlet line, before it reaches the shower pump.

Step 3 - Replace the Shower Pump

Run the shower while examining the pump. If the pump does not turn on, it may be burnt out and need to be replaced.