24/7 EMERGENCY
Burst pipe? Boiler down? No hot water? Engineers on call right now —
24/7 EMERGENCY
Burst pipe? Boiler down? No hot water? Engineers on call right now —
We replace leaking, corroded and undersized hot water cylinders across Lambeth — from vented cylinder swaps in Clapham’s period homes to unvented upgrades for stronger pressure in Streatham and Herne Hill. Correctly sized for your household, fully compliant with Building Regulations, at a fixed price with no call-out charge.
SW2
SW4
SW8
SW9
SE11
SE24
SE27
Tell us about your system and we’ll confirm pricing before attending.
From leaks to poor pressure, these are the reasons our engineers are called out to replace hot water cylinders most often across Lambeth.
Older copper cylinders, common in Clapham and Brixton's period conversions, corrode with age and eventually develop leaks around welds or fittings.
A vented cylinder relies on gravity from a loft tank, giving noticeably weaker pressure than mains-fed water — a common frustration in Herne Hill and Streatham's larger houses.
An undersized cylinder struggles to keep up with a growing household's demand, particularly across multiple bathrooms in larger Lambeth properties.
A faulty immersion element or cylinder thermostat can leave a household without hot water even when the rest of the heating system is working fine.
A correctly sized, properly commissioned cylinder, not just a like-for-like swap of the old for the new.
Your engineer reviews your current cylinder, household hot water demand, and whether an unvented upgrade is suitable for your Lambeth property.
The existing cylinder is safely drained and removed, along with any associated pipework that needs replacing.
The new cylinder is installed and connected, with safety valves, expansion vessels and controls fitted correctly for vented or unvented systems.
The system is tested for correct pressure and temperature, and unvented installations are certified to Building Regulations G3 as required by law.
A correctly specified cylinder improves daily comfort and removes the risk of a sudden leak.
Upgrading to an unvented cylinder delivers strong, consistent pressure to every shower and tap, without relying on gravity from a loft tank.
Replacing an ageing, corroding cylinder proactively avoids the water damage and disruption a sudden leak can cause to flats and rooms below.
A correctly sized cylinder keeps up with multiple bathrooms and showers running back-to-back, common in larger Lambeth family homes.
Removing a vented system's cold water tank frees up valuable loft or airing cupboard space, a popular benefit when upgrading to unvented.
Cost depends on cylinder type, size and whether pipework needs adapting. All prices confirmed before we attend — no call-out charge.
Standard replacement, existing pipework
150–180 litre, 1–2 bathroom property
210–300 litre, multiple bathrooms
Includes loft tank removal, pipework changes
Element and thermostat
Safety valve and pressure check
Fast site visits and reliable scheduling across all Lambeth postcodes, from Clapham to Brixton and Streatham.
Every replacement is based on your actual hot water demand — number of bathrooms, household size and usage — rather than a default size.
All unvented cylinder work is carried out and certified to Building Regulations G3, as legally required for this type of system.
The same fixed pricing applies whether you're in SW4 Clapham or SE27 West Norwood — no zone uplift, no call-out charge, no extras added after the fact.
A popular upgrade across Lambeth's larger properties, requiring careful pipework and loft or cupboard tank removal — work we carry out regularly.
All cylinder replacement work in Lambeth carries our 12-month guarantee, issued in writing on completion.
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“Old copper cylinder in our Clapham flat had started weeping around the base, clearly on its way out. Replaced like-for-like the same week, no fuss and no more worrying about it failing overnight.”
“Fed up with weak shower pressure in our Streatham house for years. Upgraded to an unvented system, removed the loft tank too, and the difference in every shower is honestly night and day.”
“Household of four constantly running out of hot water with the old cylinder. Sized up properly for our household this time, no more cold showers for whoever goes last.”
Our cylinder specialists cover the whole Lambeth borough — fixed pricing and same availability across every postcode, no area surcharges.
Cylinder replacement available
Cylinder replacement available
Cylinder replacement available
Cylinder replacement available
Cylinder replacement available
Cylinder replacement available
Cylinder replacement available
Yes. We cover the entire Lambeth borough — SW2, SW4, SW8, SW9, SE11, SE24 and SE27 — including Clapham, Brixton, Vauxhall, Kennington, Herne Hill and Streatham, with no zone surcharge.
A like-for-like vented cylinder replacement starts from £950. An unvented cylinder starts from £1,850 for standard size and £2,400 for larger properties. A full vented-to-unvented upgrade starts from £2,600. All prices confirmed before work begins.
A vented cylinder is fed by gravity from a cold water tank in the loft, giving weaker pressure. An unvented cylinder connects directly to the mains, delivering strong, consistent pressure to every outlet without needing a loft tank.
Yes. Unvented cylinder installations must comply with Building Regulations G3 and be installed by a qualified, certified engineer — which we are for every unvented job we carry out.
This depends on your household size and number of bathrooms. As a guide, a 1–2 bathroom property typically needs 150–180 litres, while larger properties with multiple bathrooms often need 210–300 litres. We confirm the right size during the visit.
Most cylinders last 10–15 years, though this varies with water hardness and maintenance. Signs it's time for a replacement include leaking, corrosion, or noticeably reduced hot water performance.
Fixed price confirmed before we start. Correctly sized, fully certified. 12-month guarantee. All Lambeth postcodes.
We also cover these neighbouring boroughs — same fixed prices, same-day availability.
