Cold Water Feed Repair (Cylinder)

What this service covers

A focused repair service for cold water supply faults affecting domestic hot water cylinders, with clear explanations and practical options.

• Fault diagnosis on the cold feed to the cylinder and related pipework
• Repair or replacement of common components (valves, fittings and controls)
• Checks for restrictions, airlocks, leaks and incorrect settings
• Safe isolation and reinstatement of water supplies
• Functional testing to confirm reliable refill and hot water delivery
• For unvented cylinders, work completed by appropriately certified engineers

When you may need a cold water feed repair

This service is most relevant if your hot water is unreliable or the cylinder is not behaving as it should. Common signs include slow or failed cylinder refill, fluctuating hot water, reduced flow at hot taps, unusual noises during refill, or repeated need to bleed air from the system. It can also help after changes to plumbing, stop taps or valve replacements that have affected flow.

What happens during the visit

The engineer will ask about symptoms, then inspect the cylinder setup and trace the cold feed to identify where flow is being restricted or lost. Testing may include checking isolation valves, pressure reducing valves (where fitted), non return valves, feed arrangements from a storage cistern or mains, and signs of leaks or debris. Once the cause is confirmed, the repair is completed, the system is refilled and tested, and you are told what was done and why.

After the repair

You will get practical guidance on how to monitor performance and what to do if symptoms return. If the fault points to wider issues, such as ageing valves, incorrect pipe sizing or a cylinder component nearing end of life, you will be given clear next step options. For unvented systems, safety devices are checked and left operating correctly as part of the handover.