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Cardiff Bay · Electric hot water

A 200-litre Gledhill hot-water cylinder for a Cardiff Bay flat.

When everyone needs a shower or bath before 8am, the busiest hour is the one that matters. In this Cardiff Bay flat, we replaced the hot-water cylinder with a Gledhill 200-litre direct unvented model and fitted a new expansion vessel.

Electric immersion heating warms the stored water, and the mains supply delivers it to the taps and showers. The film follows our Principal Engineer, Kieran Heycock, through the installation.

Watch the Cardiff Bay installation

Would 200 litres suit your home?

Start with your busiest hour. Are two people showering one after the other, or is someone filling a bath while another tap is running? Stored capacity and the water coming into your home both matter.

At SwiftHeat UK Group Ltd, we assess first and recommend second. We ask about your peak use, check the mains supply and explain which cylinder size suits your home. You receive a fixed price before work begins.

From the old cylinder to the resident’s handover

Cylinder and pipework

Our G3-qualified Principal Engineer, Kieran Heycock, removed the existing cylinder and expansion vessel. He reconfigured the pipework to suit the new Gledhill cylinder.

Inlet controls and testing

Kieran fitted the new expansion vessel and inlet controls, checked the connections for leaks and tested the system through a full heating cycle.

Controls and aftercare

Before leaving the flat, Kieran showed the resident how to use the controls and provided the handover documents. SwiftHeat backs the workmanship with a 12-month installation guarantee.

Our 2026 Energy Efficiency Awards

At the Wales Energy Efficiency Awards, SwiftHeat won Boiler Installer and Heating Contractor of the Year. We were also Highly Commended for Energy Consultancy of the Year and Commended for Vulnerable Customer Support Organisation of the Year.

At the UK National Energy Efficiency Awards, we received a Special Commendation in the Boiler Installer and Heating Contractor of the Year category.

Thinking about replacing your hot-water cylinder?

Tell us your postcode, what cylinder you have now and when hot water tends to run short. We’ll help you work out what size suits your home.

0800 043 3464
info@swiftheatuk.co.uk

Care in every connection. Confidence in every detail.

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From our South Wales base, we work across Wales and the UK on gas, oil, LPG and electric heating, hot water, air source heat pumps and solar power.