Cold Water Storage Tank Maintenance in London

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

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.

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.

Local conditions we work around

Loft tanks are still common in London's older housing, and two things go wrong with them. Hard water leaves deposits in the base that eventually reach the outlet, and an uncovered or poorly covered tank collects debris and, occasionally, worse. The Water Supply Regulations require a properly lidded, insulated, screened tank, and a surprising number of London lofts do not have one. The other decision worth making is whether you still need the tank at all, or whether the property suits an unvented conversion.

Areas we cover

No postcode costs more than another. Pick your area for local streets, common problems and nearby reviews.

Rickmansworth Muswell Hill Hampstead Kentish Town Highgate Golders Green Hendon Mill Hill Crouch End Hornsey Wood Green Stoke Newington All London areas →

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.

Cold Water Storage Tank Maintenance? Call.

Ring and talk to someone straight away. Photos on WhatsApp help us bring the right parts.

020 3674 8514

Or WhatsApp 07865 292684

From	£380 replaced
Next availability	2 weeks
Guarantee	12 months
Quote	Fixed, in writing