Water Heater Plumbing in Walsall
No hot water, a cylinder that’s leaking, or a discharge pipe dripping outside? Prime Boiler Co handles water heater plumbing in Walsall — immersion heaters, cylinder pipework, valves, thermostats and discharge repairs — with clear fixed prices agreed before any work starts.
Request a Quote
Water Heater Plumbing Services in Walsall
- Immersion heater replacement — element and thermostat, without touching a sound cylinder
- Cylinder thermostats — failed, lukewarm, or scalding water
- Pressure relief valves and expansion vessels — pressure swings and passing valves
- Discharge pipework — dripping outside, run safely and correctly
- Feed and expansion pipework — vented systems, loft tanks, and gravity feeds
- Cylinder swaps, pipework side — like-for-like swaps and vented-to-unvented conversions — see our water heaters page for cylinder options
- Annual unvented safety checks — booked alongside boiler servicing
The Parts That Fail Most
Immersion Heaters
A home with a hot water cylinder usually has an immersion heater sitting in the top of it: an electric element that heats the water directly. When the boiler is running fine but there is still no hot water, the immersion heater or its thermostat is often the culprit. A failed immersion heater is one of the most straightforward water heater repairs — the element and thermostat are replaced without touching the cylinder itself, and the job normally falls within the common-repairs band. It is also the backup that matters most in winter: if the boiler goes down, a working immersion heater still gives the household hot water while the boiler is fixed.
A Dripping Discharge Pipe Needs Attention, Not a Bucket
On an unvented cylinder, a short pipe runs from the safety valves to outside the house. If that pipe starts dripping, the safety valves are releasing pressure — they are doing their job, but something has made them open: a failed expansion vessel, a faulty pressure relief valve, or pressure building past where it should be. Never cap, block, or redirect that pipe, and do not leave it dripping for weeks. It is a prompt to have the cylinder checked, because the valves and vessel are safety devices, and on unvented systems that check belongs to an engineer with the specific unvented (G3) qualification.
Cylinder Pipework, Valves, and Thermostats
Beyond the cylinder itself, the feed pipes, the expansion vessel, the pressure relief and temperature relief valves, and the cylinder thermostat all have to work together. A thermostat set wrong or failed leaves water scalding or lukewarm; a tired expansion vessel shows up as pressure swings and dripping discharge pipework; scaled valves in a hard-water home stick and pass. When we price a repair, the fixed price covers the part and the work — agreed before anything starts, as with every job on this page.
Fixed & Honest Pricing
Common water heater plumbing repairs — immersion heaters, thermostats, valves — normally fall within the £70–£250 band, and small plumbing jobs £80–£180. A straightforward like-for-like cylinder swap typically starts around £700–£1,100 fitted, while a new unvented cylinder installation generally runs £1,200–£2,200 depending on size, brand, and pipework changes. You will always get the exact fixed price before we start. No other prices are quoted on this page.
How It Works
Request a quote
Request a quote for your repair or swap.
Agree the exact fixed price first
Get the exact fixed price agreed first.
Get the repair or swap carried out
The repair or swap is carried out.
System check & advice on what to watch next
The system is checked before we leave — including advice on what to watch for next.
Frequently Asked Questions
Quick answers to the most commonly asked questions about plumbing services
When the boiler is running fine but there is still no hot water, the immersion heater or its thermostat is often the culprit. It is a small, contained repair: the element and thermostat are replaced without touching the cylinder itself.
Yes — if the cylinder body is sound, replacing the immersion heater or its thermostat is usually the sensible spend, and it normally falls within the common-repairs band. A full cylinder swap is only needed when the body itself is leaking, heavily scaled, or well past its working life.
That is usually the discharge pipe from an unvented cylinder, and it means the safety valves are releasing pressure. Do not block or cap the pipe. Have the cylinder checked promptly — the likely causes are a failed expansion vessel or a faulty relief valve, and both are safety devices.
A like-for-like cylinder swap is normally completed in a single visit. A vented-to-unvented conversion takes longer, because the pipework changes: the loft tank comes out, the mains feed is reworked, and the discharge pipework has to be run safely to outside.
Yes. The loft tank comes out, the mains feed is reworked, and the discharge pipework has to be run safely to outside. That is why a conversion costs more than a like-for-like swap — and why the mains pressure and flow are tested first, before anything is promised.
Yes. The expansion vessel, pressure relief valves, and thermostats are safety devices, not optional extras, and they need a yearly check to keep working and the warranty valid. Most homeowners book the cylinder check at the same time as their boiler servicing, so both are done in one visit.
Walsall and the surrounding towns — see our service area page for the full list.
Related pages: water heaters page for cylinder replacement options; boiler servicing; emergency plumber; or use the request a quote form at the top of this page.