Fabdec Excelsior unvented cylinder service

Representative real-work image from our hot-water and unvented-cylinder jobs.

Fabdec Excelsior systems we assess

What we check before replacing a cylinder

With any unvented cylinder, the replacement decision is based on more than age. Condition, capacity, heat source, controls, discharge route, access and future hot-water demand all affect the right specification.

Direct-electric hot water

Where a cylinder uses immersion heaters for primary hot-water production, we test the supply and controls as well as the element. If a boost immersion works but overnight heating does not, the off-peak circuit, switching or lower immersion may be the real fault.

Unvented-cylinder safety

Unvented systems contain safety devices and a discharge path that must remain effective. We do not bypass safety controls to keep a system running. Any active discharge, overheating concern or electrical damage is treated as a diagnostic issue rather than a reset-only job.

Manufacturer status

Related help

Fabdec Excelsior unvented water heaters

Fabdec publishes Excelsior as an unvented water-heater range, including standard and bespoke hot-water solutions. In larger or unusual applications, model identification is especially important because connections, capacity and heat-source configuration may not match a standard domestic cylinder.

Before replacement we measure the available space and identify direct versus indirect heating, immersion ratings and the safety/discharge arrangement. A bespoke existing cylinder may require a more deliberate specification than an off-the-shelf swap.

Serviceability first

If the fault is limited to an immersion, thermostat or replaceable control and the vessel remains sound, repair can be the better-value route.