Powerful, reliable hot water — cylinders installed and serviced.
An unvented cylinder gives mains-pressure hot water to every tap and shower in the house. Stewart is G3 qualified (a legal requirement for unvented work) and installs Megaflo, Telford and Gledhill systems — plus services and repairs your existing cylinder.
Mains pressure everywhere
Multiple showers running at full pressure.
G3 qualified
Legally required certification for unvented cylinders.
Annual service
Expansion vessel, PRV, T&P valve and immersion checked.
Repairs & swaps
Leaking coils, failed immersions, tundish drips fixed.
Vented vs unvented — which is right?
Older houses with a loft tank use a vented cylinder — cheap to run, but weak shower pressure without a pump. An unvented cylinder connects straight to the mains, giving strong hot water everywhere and freeing up loft space. Ideal when you convert the loft or add an en-suite.
Servicing
Unvented cylinders are legally required to be serviced annually. Stewart checks the expansion vessel charge, tests the temperature & pressure relief valve, cleans the strainer and confirms the safety discharge is correct.
Local coverage
Personally delivered by Stewart Hardy across Addlestone, Egham, Chertsey, Staines-upon-Thames, Chobham, Woking, Maidenhead, Weybridge, Ottershaw, New Haw, Woodham, Byfleet, West Byfleet, Shepperton, Walton-on-Thames, Virginia Water, Sunbury-on-Thames, Windsor, Ashford, Lightwater and surrounding Surrey villages within 15 miles of Addlestone.