Unvented Hot Water Cylinder Services in Colchester (G3)
G3 qualified engineers for unvented cylinder installation, repair, and servicing in Colchester, Wivenhoe, Tiptree and across Essex. Cylinder specialists with expertise in all major brands.
Unvented cylinder repair and servicing
Installation
New unvented cylinder installation with full system design and commissioning.
Repair
Fault diagnosis and repair for all unvented cylinder brands.
Servicing
Annual servicing to maintain safety and efficiency.
Replacement
Upgrade your old cylinder to a modern, efficient unit.
Unvented cylinder service in Colchester
We service and repair all major unvented cylinder brands. Our G3 qualified engineers carry common parts for faster repairs.
- Megaflo
- Gledhill
- Heatrae Sadia
- Range
- Telford
- OSO
- Joule
G3 qualification and safety
Unvented hot water cylinders operate under high pressure and require specialist knowledge to install and maintain safely. That's why the law requires all work to be carried out by G3 qualified engineers.
- All our engineers hold G3 unvented qualification
- Work complies with Building Regulations Part G3
- Proper safety device testing on every service
Questions we get asked
An unvented cylinder is a pressurised hot water storage system fed directly from the mains. Unlike traditional vented cylinders, they don't need a cold water tank in the loft and provide mains-pressure hot water to all outlets.
Yes, by law only G3 qualified engineers can install, service, or repair unvented hot water cylinders. This ensures the work is done safely as these systems operate under high pressure. All our engineers are G3 qualified.
We recommend annual servicing for unvented cylinders. This includes checking the pressure relief valves, expansion vessel, and safety devices to ensure safe operation and maintain warranty validity.
Unvented cylinders provide mains-pressure hot water, better shower performance, no loft tank needed, and can supply multiple outlets simultaneously. They're ideal for homes with multiple bathrooms.
Yes, we repair all unvented cylinder brands including Megaflo, Gledhill, Heatrae Sadia, and more. Our G3 qualified engineers can diagnose and fix most issues quickly.
Where we work
Colchester and the villages around it. If you are just outside this list, ask anyway.
- Colchester
- Wivenhoe
- Tiptree
Also covering Rowhedge, Brightlingsea, Marks Tey, Stanway, West Bergholt, Lexden, Copford, Kelvedon, Coggeshall, Witham and Maldon.
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Free quotes, honest pricing, and a Gas Safe registered engineer on the job. Colchester, Wivenhoe, Tiptree and the surrounding Essex villages.