Southsea, Portsmouth Office 023 9200 7719

Home plumbing guide

Why is my shower pump not working properly?

Is the pump silent, or can you hear it running while the shower turns weak? Start with what you can see and hear. This guide is for a separate pump feeding a shower, often found in an airing cupboard.

Match what you notice

The pump stays silent when I turn the shower on
Some pumps need a minimum natural flow to start. Limescale at the shower head, a kink in the hose or a restriction in the feed can reduce that flow. The required flow depends on the model. An electrical supply or control fault can also leave the pump silent.
The pump runs but the shower is weak
A restriction at the head, hose, mixer or pump filter can reduce the flow. Note whether it happens on hot, cold or both. If the same pump serves another outlet, report whether that outlet is also affected.
It cuts in and out while I shower
On a flow-activated pump, flow close to the start threshold can make it cycle. Tell us if the flow pulses from the start or drops after several minutes, and whether the pump sounds different.
It starts briefly when the shower is off
A pressure-sensing pump may start when pressure falls in the pipework it serves. A dripping outlet or a small leak can cause this. Note which outlets the pump feeds and how often you hear it start.

What you can check before booking

With the shower off, look for visible limescale on the spray plate or a kink in the hose. If the pump label is easy to reach, take a clear photo of the make and model. Tell us if the problem followed a new shower head, plumbing work or a water interruption. Leave the pump casing, filters and pipe connections for the visit.

When to stop using the shower

Stop using it if the pump buzzes without running, smells burnt or has water around it. Keep clear of wet electrical equipment. A tripping circuit or suspected wiring fault needs an electrician.

What AquaFix can check

We can assess the water feed, shower fittings and accessible pump connections. The model helps identify how the pump starts, which fittings or filters it uses and what can be serviced. We discuss access and any replacement work once the plumbing checks narrow down the cause.

Further reading

All home plumbing guides

Tell us what needs attention

Have your postcode and a short description ready. If water is still escaping, call us.