Cold Water Storage Tanks
Cold Water Storage Tanks
Old galvanised or uncovered loft tanks are a hygiene and leak risk. Replacing one is straightforward and protects the whole gravity system below it.
About this service
Cold Water Storage Tanks in South West London, done properly the first time
We replace cold water storage tanks with WRAS-approved plastic tanks, fitted with a sealed lid, insect screens, proper insulation and a new float valve — plus a service valve so the tank can be isolated without draining the roof space.
We also fix overflowing tanks, replace corroded ball valves and re-support tanks sitting directly on ceiling joists, which is a common defect in Kingston upon Thames's older lofts and a real risk of a ceiling collapse.
Why Maxfix
Why choose Maxfix for cold water storage tanks
Premium workmanship, fixed pricing and a service experience built around you.
WRAS-approved tanks with sealed, screened lids
New float valve and service valve fitted
Correct bearers to spread the load safely
Full insulation against freezing
Overflow and dribbling ball valves cured
How it works
A calm, four-step process
From the first call to a tidy handover — no surprises, no jargon, no mess.
Get in touch
Call us or send a quick enquiry — we'll respond within an hour during working hours.
Free survey & quote
An engineer assesses the work and gives you a clear, written, fixed-price quote.
Book a date that suits you
Choose a slot that fits around your schedule — we work evenings and weekends.
Work completed cleanly
Uniformed engineers carry out the work, tidy up fully and walk you through everything before leaving.
Get a fast quote for cold water storage tanks
Free, no-obligation quotes. Most calls answered within 30 seconds.
Trusted experts
Why choose Maxfix
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited [to be confirmed]
[accreditations to be confirmed]
Open 24 Hours, Every Day
Call any time — including nights and weekends
Fixed Price, Always
Agreed before we start — no hourly creep
Frequently asked
Your questions, answered
Do I still need a loft tank?
Only on gravity systems. If you're moving to a combi or unvented cylinder the tank can usually be removed entirely — we'll advise.
Why is my loft tank overflowing?
A worn float valve washer or a valve set too high. It's an inexpensive fix and stops water running down the outside wall.
Is my old galvanised tank a problem?
They corrode and often lack a proper lid, which risks contamination. Replacement with a covered plastic tank is the standard fix.
Can a tank freeze in the loft?
Yes, if insulation is missing. We insulate the tank and its pipework — and never insulate directly under the tank, so warmth from below reaches it.
Which areas of South West London do you cover for cold water storage tanks?
We provide cold water storage tanks across the whole of South West London, including Kingston upon Thames, Richmond, Wimbledon, Twickenham, Surbiton, Fulham, Putney, Teddington, New Malden, Molesey, Hounslow, Brentford, Isleworth, Long Ditton, Worcester Park, Roehampton, Raynes Park, Morden, Petersham, Motspur Park and the surrounding KT, TW and SW postcodes. Local engineers means short call-out times wherever you are.
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Book cold water storage tanks with a Gas Safe engineer — fixed pricing, open 24 hours.
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Book cold water storage tanks today
Free quotes, fixed pricing and Gas Safe engineers across Kingston upon Thames, Richmond, Wimbledon, Twickenham and the rest of South West London.