Gledhill StainlessLite cylinder repair & installation

Gledhill models and systems

Faults we diagnose

A cylinder can be blamed when the actual fault sits in the electrical supply, Economy 7 switching, immersion heater, thermostat, wiring, motorised valve, boiler/heat-pump heat source, pressure controls or discharge arrangement. We test the relevant system before recommending a replacement.

Installation and replacement

For replacement we check usable cupboard space, cylinder capacity, mains pressure and flow, discharge route, direct versus indirect heat source, electrical circuit, immersion strategy and future plans such as solar PV or a heat pump. In London flats we also plan access, leasehold constraints and compact/slimline options where relevant.

Direct electric and Economy 7 cylinders

Direct cylinders commonly use one or more immersion heaters. In an Economy 7 property the lower immersion is often arranged for off-peak heating while an upper immersion provides a boost. If the overnight hot water disappears but boost still works, the fault may be in the off-peak supply, switching, circuit, thermostat or immersion element rather than the cylinder shell.

Unvented safety and servicing

Unvented systems operate with safety controls and discharge arrangements that must remain functional. Servicing is more than checking for leaks: controls, valves, expansion provision and the discharge path are inspected in line with the system type and current manufacturer instructions. We do not bypass safety devices to keep a cylinder running.

Related pages

Manufacturer status

Gledhill StainlessLite and other cylinder families

Gledhill manufactures vented and unvented hot-water cylinders, with StainlessLite being a major unvented family. Some models are designed for conventional boiler systems while others are intended for renewable or specialist heat-source applications.

A Gledhill cylinder can therefore look similar externally while having a very different coil arrangement internally. Before replacement we identify whether the cylinder is direct electric, single-coil indirect, twin-coil or designed for a heat pump/renewable system.

Older Gledhill systems

The Gledhill name also appears on older thermal-store and hot-water products. We do not assume a current StainlessLite cylinder is a like-for-like replacement for every legacy Gledhill unit; the original system layout has to be understood first.