Hot Water Systems
Hot Water Systems, Cylinders & Repairs in South West Wales
No hot water, lukewarm showers or a cylinder that will not heat up — we diagnose and repair hot water systems across Ammanford, Swansea, Neath and Carmarthenshire, from a failed immersion heater to a full cylinder replacement.
No hot water or running lukewarm
On a combi boiler, lukewarm water usually means a diverter valve, a scaled plate heat exchanger or a sensor reading wrong. On a conventional system it is more often the cylinder thermostat, a motorised valve or the immersion heater.
We test rather than guess, tell you which part has failed, and give you the cost before anything is replaced.
Cylinders and hot water upgrades
When a cylinder is leaking or too small for the household, we replace it — vented or unvented, depending on the incoming mains pressure and what the property can support. Unvented cylinders give mains-pressure hot water throughout the house, with the safety controls fitted and commissioned correctly.
If a combi conversion would suit you better than a cylinder, we will explain the trade-offs honestly — including what happens when two taps are running at once.
Maintenance that prevents surprises
Scale and corrosion are what shorten the life of a hot water system in this area. We can fit scale reducers where the water is hard, replace tired immersion elements and check safety valves and expansion vessels during a service.
Small jobs like a dripping temperature relief valve are worth doing early — they are far cheaper than the water damage they cause.
What's included
- No hot water diagnosis and repair
- Diverter valve and plate heat exchanger replacement
- Immersion heater replacement
- Vented and unvented cylinder installation
- Cylinder thermostat and motorised valve repairs
- Expansion vessel and safety valve checks
Talk to us
Urgent? Call rather than email.
Hot Water Systems
Frequently asked questions
Why is my hot water fine in the morning but cold later?
That pattern usually points to a motorised valve sticking, a cylinder thermostat or a programmer setting rather than a failed boiler. It is quick to test and usually a straightforward repair.
Can you replace a leaking cylinder?
Yes. We drain down, remove the old cylinder and fit the replacement, including the safety controls on an unvented unit. Most cylinder swaps are done in a day.
Do I need to drain the whole system to change an immersion heater?
Only the cylinder, not the heating circuit. We isolate the supply, drain the cylinder and fit the new element, then test the temperature and the safety cut-out.
Need a plumber, heating engineer or Gas Safe check?
Tell us what is happening and we will advise on the next step. For anything urgent — a leak, a burst pipe or no heating — call instead of waiting for a reply.