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.
Cold Water Storage Tanks in North 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 Barnet's older lofts and a real risk of a ceiling collapse.
Why choose Norvex 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
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.
Why choose Norvex
Gas Safe Registered
Every engineer registered & ID-checked
Manufacturer Accredited
Worcester, Vaillant, Ideal & more
Same-week Appointments
Most jobs booked within 48 hours
5★ Reviewed
Hundreds of verified reviews
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 North London do you cover for cold water storage tanks?
We provide cold water storage tanks across the whole of North London, including Barnet, Finchley, Muswell Hill, Hampstead, Highgate, Enfield and the surrounding N, NW and EN postcodes. Local engineers means short call-out times wherever you are.
What our customers say
"Quoted, fitted and gone in a day. New boiler, no fuss, new smart thermostat thrown in. Best tradespeople we've had in years."
Sarah, Barnet
"Emergency call at 9pm — engineer on site by 10:30. Sorted the leak that night. Highly recommend."
Michael, Finchley
"Total bathroom renovation. Beautiful job, on budget, finished early. We'll be using Norvex for the kitchen next."
Priya, Highgate
Ready when you are
Book cold water storage tanks with a Gas Safe engineer — fixed pricing, same-week appointments.
Book cold water storage tanks today
Free quotes, fixed pricing and Gas Safe engineers across Barnet, Finchley, Muswell Hill, Hampstead and the rest of North London.