What shortens a pump's life
The biggest killer is air. Pumps are designed to move water, and if air reaches them from a poorly placed hot feed, a low tank or an airlock, they run hot and noisy and the seals wear fast. A cold water tank with too little water in it, or a hot feed taken off the top of the cylinder in the wrong way, can starve the pump every time it runs.
Debris and limescale come next. In hard water areas, scale builds up on the impellers and in the valves, and grit from old pipework can scratch seals. Finally, a pump that cycles on and off because of a small drip somewhere downstream is working far more often than it should.
Signs a pump is failing
Noise that has changed is the usual first sign: a new grinding, whining or rattling note, or a pump that runs for a few seconds after every tap is closed. Flow that pulses, or drops away partway through a shower, points the same way.
Water around the pump, even a slow weep from a fitting or the body, needs looking at quickly, because pumps usually sit in airing cupboards or lofts where a leak can do damage unseen. A pump that will not start, or trips the electrics, should be switched off at its isolator and left off until it has been checked.
Repair or replace
A leak at a connection, a failed flexible hose or an airlock in the supply is often a fair repair, because the pump itself is fine. A worn motor, failed seals inside the body, or a pump that has been running noisily for months is a different story; by then the internal wear usually makes replacement the better use of money.
Age matters too. If the pump is well past its warranty and has started showing more than one symptom, a repair on one part often leads to another failing soon after. We give you both options and a fixed written quote so you can decide.
Why the replacement must suit the system
Replacing like for like is only right if the original was right for the house. A pump sized for a single shower struggling to feed a whole-house supply will fail early again. The type matters too: a positive head pump needs the tank high enough above the shower outlet; a negative head pump is needed where it is not. Pumps are also only for gravity systems, never for boosting directly from the mains.
If the pump needs a new or moved electrical supply, that work is done by a Part P registered electrician.
Making the next pump last longer
Keep the loft tank topped up and its lid on. Have any drips on the pumped supply fixed so the pump is not starting on its own. Leave access to the pump clear so it can be checked, and do not box it in tightly, as pumps need some airflow. Clean shower heads regularly in hard water areas, because a blocked head makes the pump work harder for the same flow.
Getting a pump looked at
Send a short video of the pump running, with the sound on, plus a photo of its label and of the tank and cylinder. That often shows whether it is an air, supply or wear problem before a visit. For a leaking pump, isolate it, turn it off at the switch and we will help as soon as we can in normal working hours.