Why does a pump keep running when no water is being used?
Shaun recently attended a job in Guildford where the pump was continuously running — a sign that something wasn’t quite right within the system.
The solution? A new expansion tank.
An expansion tank, also known as a pressure vessel, helps regulate pressure within a pumped water system. It stores pressurised water and reduces the number of times the pump has to start and stop.
When the expansion tank fails, loses pressure, or becomes waterlogged, the pump may begin cycling too often or running continuously. This can lead to:
⚠️ Unnecessary wear on the pump
⚠️ Higher energy use
⚠️ Pressure issues
⚠️ Premature pump failure
⚠️ Costly repairs if left unchecked
By fitting a new expansion tank, Shaun restored the system back to working as it should — helping protect the pump and keeping things running efficiently.
If your pump is running more than usual, making noise, losing pressure, or constantly kicking in and out, don’t ignore it.
Get in touch with Alton Facility Services today — we can inspect, diagnose and repair pump system issues before they become a bigger problem.
Checking the whole pump system
The update “Why Does a Pump Keep Running When No Water Is Being Used?” shows why pump faults need a system-level check. A pump can run continuously because of pressure loss, a control fault, a failed non-return valve or a problem with the vessel.
Replacing the pump without checking the controls and pipework can leave the original cause unresolved. AFS tests the relevant components and explains which repair is justified.
Where a replacement is needed, the duty point, flow, head and operating conditions should be confirmed before a new pump is selected.
If you have a similar issue, send the postcode, a short description and any useful photos to AFS. We can then confirm whether a site visit, survey, service appointment or written quotation is the right next step.
- System-level checks
- Repair where practical
- Replacement when justified
- Planned servicing
Related AFS service
This update relates to Pump Servicing.
View Pump ServicingOriginal source: view post