Stuart Turner Pump Repair London

Stuart Turner faults we repair

On Monsoon shower pumps the usual calls are a pump that runs continuously, a pump that will not start when the shower is opened, a pump that hums but does not turn, and one that has become alarmingly noisy. Those map onto a small set of causes: a failed flow or pressure switch, an airlock in the hot feed, a seized impeller after a period of standing, a failed run capacitor, or worn bearings. On Aquaboost sets the faults are more often vessel pre-charge, controller settings or a passing non-return valve.

• Flow and pressure switch failure
• Airlocks in the hot feed from the cylinder
• Seized impellers after standing or running dry
• Failed run capacitors on single-phase motors
• Worn bearings causing noise and vibration
• Leaking mechanical seals and body joints

Why the pump runs when no tap is open

A pump that runs on its own is being triggered by a genuine pressure drop somewhere — most often a passing non-return valve on the outlet, a dripping tap or shower valve, or a leaking joint on the pumped pipework. Occasionally the switch itself has failed. We isolate sections of the pumped circuit to find where the pressure is escaping instead of simply swapping the switch, because replacing a switch on a system with a passing valve just moves the problem.

• Pumped circuit isolated section by section
• Non-return valves tested for passing
• Dripping outlets and weeping joints located
• Switch replaced only where genuinely at fault

Installation faults behind many failures

Stuart Turner pumps are reliable when installed to the manufacturer's requirements and short-lived when they are not. The recurring problems we find are inadequate hot water supply arrangements that let the pump draw air, flexible hoses replaced with rigid pipe so vibration is transmitted through the building, pumps sited above the cylinder outlet so they cannot self-prime reliably, and no isolation valves. Where we repair a pump we correct the installation faults that caused the failure, otherwise the new parts follow the old ones.

• Correct hot feed arrangement to stop air ingress
• Flexible hoses and anti-vibration mounts refitted
• Pump re-sited where it cannot prime
• Isolation valves fitted for future servicing

Repair, warranty and replacement

Spares availability for Monsoon and Aquaboost is good, so seals, impellers, capacitors, switches and brass ends are all replaceable. If your pump is still within its manufacturer warranty we will tell you and advise you to claim rather than charging for a repair. Where a pump has been running dry, the motor has burnt out or the body is corroded, we quote a replacement of the correct duty and negative or positive head configuration for your system.