Hot Water Cylinder Repair & Replacement in Richmond upon Thames

Unvented cylinders store water at mains pressure and are legally G3-controlled work — installation and repair must be done by a qualified engineer. Every unvented job in Richmond upon Thames through this site is routed to G3-qualified engineers as standard.

Vented vs unvented: what you've got matters

A vented cylinder is fed by gravity from a cold-water tank (usually in the loft) and vents to atmosphere — simple, tolerant, low-pressure. An unvented cylinder is fed directly from the mains, delivers strong pressure to every outlet, and manages expansion with a sealed vessel and safety valve set. The unvented type is legally G3-controlled: installation, and work on its safety controls, must be carried out by a G3-qualified engineer. Every Richmond upon Thames job on this site involving an unvented cylinder is tagged and routed to G3-qualified engineers automatically.

Common cylinder faults we repair

The repair list in Richmond upon Thames runs: immersion elements and their thermostats, cylinder stats, two-port valve heads and bodies, unvented safety kit — pressure-reducing valves, expansion vessels, relief valves — and weeping connections at the coil or immersion boss. A cylinder shell that's leaking from the body itself, though, is terminal: shells aren't repairable, and we'll say so straight away rather than sell you a doomed fix. Richmond's water is hard, and the borough's larger family houses — often with multiple bathrooms and unvented systems — give scale plenty of equipment to work on.

Repair or replace: the honest arithmetic

A cylinder under ten years old with a component fault is nearly always worth repairing. Past fifteen years, with heavy scale, repeated element failures or corrosion at the connections, replacement wins on running cost alone — a scaled coil transfers heat badly, so you pay to heat water slowly. Replacement quotes in Richmond upon Thames itemise the cylinder, the safety kit (for unvented), and disposal, so you can compare like with like.

Cylinder costs in Richmond upon Thames

From £150 covers most Richmond upon Thames cylinder repairs with common parts. Replacement is a bigger conversation — vented like-for-like at the affordable end, unvented systems (cylinder, G3 safety kit, discharge arrangements, commissioning) costing more but transforming shower and tap pressure. You'll get both options priced where both are viable.