Cold Water TankInstallation & RepairBolton & Manchester
Loft cold water storage tanks replaced, repaired and upgraded. We fit modern WRAS-compliant plastic tanks with full byelaw 30 kits, replace failed ball valves, and remove old galvanised tanks safely.
WRAS-compliant • Byelaw 30 kits included • Insulated as standard
25+ Years
Experience
All Sizes
Tank Types
WRAS + Byelaw 30
Standards
Gas Safe
Registration
Workmanship
Guarantee
Modern Cold Water Storage — Done Right
If your home has a hot water cylinder (rather than a combi boiler), there's almost certainly a cold water storage tank in the loft feeding it. Old galvanised steel tanks corrode, old plastic tanks crack, and lids that don't seal properly let contamination into your drinking water.
We replace failed and ageing tanks with modern WRAS-approved plastic tanks fitted with a full byelaw 30 kit — sealed lid, insect screens on overflows and vents, fitted insulation jacket — to keep the water clean and to comply with the Water Supply Regulations.
We also repair specific faults: failed ball valves causing tank overflow, split tanks dripping into the ceiling below, and noisy ball valve hammer that wakes the house at 3am.
Real Work Examples
Why Old Cold Water Tanks Need Replacing
Old galvanised tanks rust from the inside, contaminating the water with iron and shedding flakes into the system that block valves and damage the cylinder. Old open or poorly-sealed tanks let dust, insects and worse into your drinking water supply.
Byelaw 30 (now incorporated into the Water Supply Regulations 1999) requires every cold water storage tank to be sealed, insect-proofed, insulated, and supplied with a protected, screened overflow.
- Old galvanised tanks corrode internally — flakes block valves and contaminate water
- Open or unsealed tanks fail byelaw 30 and allow contamination
- Cracked plastic tanks leak slowly into ceilings, causing damp and staining
- Failed ball valves cause continuous overflow — wasted water and potential damage
- Uninsulated tanks freeze in cold lofts, splitting and flooding when they thaw
Our Process
Survey
We assess existing tank, access, pipework and supports before quoting. Loft access and clearance checked for tank size.
Isolate & Drain
Mains isolated, tank drained down through the cylinder or via temporary pump.
Remove Old Tank
Old galvanised or plastic tank removed safely. Steel tanks cut into sections where needed for safe loft removal.
Install New Tank
New WRAS-approved tank set on proper supports, plumbed in, ball valve and overflow fitted, full byelaw 30 kit installed.
Refill, Test & Insulate
System refilled, ball valve adjusted to correct water level, all joints leak-tested, insulation jacket fitted before we leave.
Why Choose Conroy
WRAS-Approved Tanks
Modern food-grade plastic tanks compliant with current regulations — clean, durable and well-supported.
Byelaw 30 Kit
Sealed lid, insect-screened overflow and vents, insulation jacket — all fitted as standard, not optional extras.
Frost Protection
Tank wrapped in a proper insulation jacket and (where needed) pipework lagged to prevent loft freezing.
Quiet Ball Valves
Modern silent-fill ball valves fitted as standard — no more 3am water hammer.
Old Tank Removed
Galvanised tanks cut up and removed; plastic tanks taken away. Loft left clean.
Workmanship Guarantee
All installation work guaranteed on the workmanship we've carried out.
Technical Detail
Tank Sizing
Domestic cold water storage tanks are typically 50, 70 or 100 gallons (227, 318 or 454 litres). Size depends on family size and whether the tank also feeds the hot water cylinder. We'll advise based on usage and loft access.
Galvanised vs Plastic
Galvanised steel tanks were universal until the 1980s but corrode from the inside. Modern WRAS-approved plastic tanks don't corrode, are lighter, and are easier to fit in awkward lofts.
Byelaw 30 in Detail
Requires: a sealed lid that prevents contamination; insect screens on all overflow and warning pipes; a screened breather; an insulating jacket; and clearance around the tank for inspection.
Ball Valve Choice
Silent-fill 'Torbeck' style valves are quieter than traditional brass piston valves and respond faster — no slow trickle as the level approaches full. We fit these as standard.
Switching to Mains-Pressure
If your tank is failing and you'd prefer to lose the tank altogether, an unvented cylinder system gives you mains-pressure hot and cold throughout the house. We can quote both options.
Frequently Asked Questions
Looking for something else? Phil also covers 24/7 emergency plumbing, full boiler installation and boiler repairs, annual boiler servicing, central heating installation, power flushing, leak detection and landlord gas safety certificates (CP12). Browse the full list on our services page or see recent jobs and customer reviews.
Based in Bolton, we work across Bolton, Manchester, Bury, Blackburn, Chorley, Wigan, Preston and Salford. See all areas we cover, learn more about Phil Conroy, or get in touch for a free quote.
Related Services
Ready to Get ThisSorted Properly?
Speak directly to Phil. No call centres, no scripts — just honest advice, fair pricing, and work you can rely on.