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Planned work · London · from £380 replaced

Cold Water Storage Tank Maintenance in London

Loft tanks feed millions of older systems and are ignored in all of them.

Get a fixed quote Or call 020 3674 8514
Cold water tank maintenance in London
No call-out feeNo night or weekend surchargeFixed price before we start12-month workmanship guarantee

A failing tank announces itself through a bedroom ceiling, a checked one costs a fraction of that conversation.

What you get

Cold water tank maintenance in London: what the price includes

  • 01
    Inspection and hygiene

    Lid, insulation, insect screens and water condition checked, Legionella risk in tepid open tanks is real and manageable.

  • 02
    Float valve service

    The stuck float valve that overflows through the ceiling is this page's classic emergency, serviced in minutes.

  • 03
    Replacements

    Old galvanised tanks (rusting from inside) swapped for insulated plastic, with bearers and pipework brought to spec.

  • 04
    Removal for upgrades

    Going unvented or combi? Tanks drained, cut and removed as part of the conversion.

  • 05
    Byelaw 30 kit fitted as standard

    A modern replacement comes with a close-fitting lid, insulation, screened warning pipe and screened vent. It is a legal requirement and it keeps out the dust, insects and rodents that make an uncovered loft tank a genuine contamination risk rather than a theoretical one.

What this means in London

Local conditions we work around

Hard water is the defining fact for London heating. At 280 to 320 ppm, scale builds on the hottest surface in the system, which is the boiler heat exchanger, and every millimetre of it costs efficiency and shortens the life of the unit. It is why we flush before commissioning a new boiler, why we fit a scale reducer on the mains where the system warrants it, and why an unvented cylinder in London needs its annual service rather more than the manual implies.

Where we do this in London

Covered across London

Same published rate card and the same twelve-month workmanship guarantee everywhere below, there is no postcode loading. Each area has its own page with an arrival time taken from our job records rather than chosen for a website.

LewishamCroydonBromleyIlfordRomfordFinchleyBarnetEnfieldWembleyHarrowStratfordWalthamstow All London areas →
Straight answers

Cold water tank maintenance in London, your questions

Water dripped through the ceiling from the loft, the tank?
Very likely its float valve or overflow. Turn off the stopcock, and if you can safely reach the loft, tie the float arm up to stop the fill. Then call, the fix is small if it's caught early.
My tank is galvanised steel, replace it?
If it's galvanised it's decades old and rusting from inside. Replace on your schedule (£380–£600 fitted) rather than the tank's, its schedule involves a ceiling.
Do tanks need cleaning?
They benefit from it, and any tank without a close-fitting lid needs one fitted more than it needs cleaning. Open tanks collect what lofts contain; none of it improves your bathwater.
Do I still need a cold water tank?
Only if you have a vented system. Converting to an unvented cylinder or a combi removes the tank and frees the loft, and it is worth pricing both options if yours needs replacing anyway rather than defaulting to like-for-like.
My tank has debris in it. Is the water safe?
The cold tank normally feeds bathrooms and the hot cylinder, not the kitchen tap, so drinking water is usually unaffected. Debris still needs dealing with, the tank should be drained, cleaned, disinfected and given a proper lid.
Why does my tank overflow?
A failed float valve, almost always. The washer perishes or the arm has dropped, so the valve never fully closes. It is an inexpensive part and a short visit, and left alone it runs continuously into the gutter and up your bill.
How does London hard water affect heating work?
Considerably. Scale builds on the hottest surface in the system, which is the boiler heat exchanger, and every millimetre costs efficiency and life. It is why we flush before commissioning a new boiler here, why kettling is the most common noise complaint we get in London, and why an unvented cylinder in this city genuinely needs its annual service rather than nominally needing it.
24 hours · 365 days · London

Water where it
shouldn't be? Call.

A person answers, not a menu. You'll have an arrival time and a price range before you hang up.

020 3674 8514

Or WhatsApp 07865 292684, photos help us bring the right parts

Our engineers