Strom Prime2o unvented cylinders

Strom Prime2o 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

Strom Prime2o hot-water systems

Strom's hot-water products are used in all-electric installations where stored mains-pressure hot water is required. The exact Prime2o model and whether it is direct electric or integrated with another heat source should be confirmed from the label before parts are selected.

On a direct system, the immersion heater, thermostat and electrical supply are the first diagnostic path. On a system linked to a boiler, the cylinder controls and primary circulation also become relevant.

When hot water is intermittent

Intermittent recovery can be caused by controls as well as the heating element. A timed or off-peak supply should be checked at the correct part of its operating cycle before the cylinder is blamed.