Pump maintenance18 August 2026 6 min read

Sewage pump maintenance checklist

A sewage pump station is the least visible part of a property and the one that causes the most damage when it fails. Nearly every emergency we attend was preventable with an annual service.

This is the checklist we work through on a planned maintenance visit — useful whether you book us or simply want to know what a proper service should cover.

Monthly owner checks (five minutes)

Confirm the control panel is powered and no alarm lamp is lit.
Listen: a pump that runs longer or more often than usual is telling you something.
Check the alarm sounder still works using the test button.
Look for damp or staining around the chamber lid.

Annual service — what should be checked

Isolate power safely and prove dead before any work in the chamber.
Lift and inspect the pump on its guide rail; clear rag and fibrous debris from the impeller.
Check and clean float switches or the pressure sensor, and confirm start/stop levels.
Test the non-return valve — a failed valve lets the chamber refill after every cycle.
Check the discharge pipework and couplings for leaks and blockage.
Run the duty and standby pumps individually, and check the duty-share alternation.
Measure running current and compare against the pump's rated figure.
Test high-level alarm operation and any telemetry or auto-dialler.
Clean the chamber walls and remove accumulated fats and grit.
Record readings so next year's figures can be compared.

The four faults we find most often

Wipes and rag wrapped around the impeller — the single biggest cause of sewage pump failure.
Fat and grease binding float switches so the pump never starts or never stops.
A stuck non-return valve, which makes the pump cycle constantly and burns it out.
A dead standby pump nobody noticed, so a single failure becomes a flood.

Commercial and multi-property stations

If a pump station serves flats, a pub kitchen, a care home or a commercial unit, a twice-yearly service is the sensible interval — the duty cycle and fat loading are far higher than a single house.

It is also worth having the pump model, impeller type and control-panel details recorded somewhere accessible. When something fails at 11pm, knowing the model saves hours.

What good maintenance actually saves

A planned service is a scheduled hour on a weekday. A failed sewage pump is an out-of-hours callout, a tanker to pump the chamber down, cleanup, and sometimes a replacement pump at short notice. The maintenance is the cheap part.

Need this doing rather than reading about it?

We cover Berkshire, Surrey, Hampshire and into London with our own tanker fleet, 24/7 for emergencies, and a free no-obligation site survey within 25 miles of Ascot.

07346 123399 Sewage pump maintenance Send an enquiry

Common questions

How often should a sewage pump be serviced?

Once a year for a single domestic property, twice a year for commercial premises or a station serving multiple dwellings, and more often where fats or wipes are a known problem.

Do twin-pump stations still need servicing?

Yes, and arguably more urgently. Twin stations hide a failure because the second pump quietly covers for the first until both are gone.

Can wipes really stop a sewage pump?

Yes. So-called flushable wipes do not break down; they bind into rope around the impeller and either jam it or overload the motor.

Is it worth repairing an old pump or replacing it?

It depends on the pump, the availability of parts and how hard it works. We give you both options with the reasoning, rather than defaulting to replacement.