Hot Water Supply Fault Investigation

What the investigation covers

If you have poor hot water flow, no hot water at certain taps, or signs of a leak, this service is designed to identify the cause and restore normal operation.

• Tracing hot water delivery faults affecting one outlet or the whole property
• Checking hot water pipework for leaks, restrictions and airlocks
• Diagnosing low pressure or reduced flow issues
• Inspecting and testing isolation valves, non-return valves and faulty fittings
• Identifying problems with mixing taps, shower valves and local controls
• Isolating the water supply where needed to work safely
• Carrying out minor repairs or component replacement (where accessible)
• Testing the system after repair to confirm safe, consistent hot water

When this service is the right fit

Book a fault investigation if hot water has become unreliable and you want a clear diagnosis rather than guesswork. It’s commonly used when one bathroom loses hot water, hot water runs weak, or there is intermittent hot water despite the boiler appearing to run. It is also suitable where you suspect a hot water leak, dripping hot pipework, or unexplained damp.

How the visit works

We’ll ask a few quick questions about the symptoms, what has changed, and which outlets are affected. We then test likely causes step-by-step, isolating sections where needed to narrow down the fault. Where the issue is straightforward and parts are available, we can often complete the repair on the same visit, then test flow and temperature at the relevant outlets.

What happens after the diagnosis

You will be told what caused the problem, what has been repaired, and what to watch for next. If the fix needs additional parts or more extensive work, you will get a clear recommendation and the next steps before any further work is booked. Where relevant, we can advise on preventing repeat issues, such as sticking valves or scale-related restrictions.