Unvented Hot Water Cylinder Services
We specialise in the installation, maintenance, and repair of unvented hot water cylinders to ensure your home has a safe, reliable and powerful hot water supply. All work is carried out by G3-certified engineers in accordance with current safety regulations.
Our Services Include:
- Installation of new unvented hot water cylinders
- Replacement of old or faulty cylinders
- Full safety and performance inspections
- Annual servicing to maintain efficiency, compliance and warranty
- Temperature & pressure relief valve checks
- Expansion vessel testing and recharging
- Repair and replacement of thermostats and immersion heaters
- Leak detection and component replacement
- System performance diagnosis and fault-finding
- Upgrades to improve water pressure and flow rate
- Advice on choosing the right cylinder size for your home
- Fully G3 Qualified engineers
Frequently asked questions
What is an unvented hot water cylinder?
An unvented hot water cylinder is a pressurised system that takes water directly from the mains supply instead of a cold-water storage tank. This means you get stronger water pressure, faster flow rates, and consistent hot water throughout your property.
What are the benefits of an unvented cylinder?
Unvented systems are popular for their high performance and space-saving design. Key advantages include:
- Mains pressure hot water for powerful showers and fast-filling baths
- No need for a cold-water tank in the loft
- Better water quality (sealed system = less contamination risk)
- Energy-efficient and compatible with solar or heat pump systems
Do I need good water pressure for an unvented cylinder?
Yes. Because it runs from the mains, your property needs sufficient incoming water pressure and flow rate to perform properly. Our engineers can test your supply and recommend suitable options if upgrades are needed.
Can I replace my vented system with an unvented one?
Absolutely. Many homeowners upgrade from vented to unvented cylinders to enjoy improved pressure and efficiency. Our team will handle all pipework adjustments and safety components needed for a smooth, compliant conversion.
Are unvented cylinders safe?
Yes — when installed and maintained by qualified engineers, unvented systems are extremely safe. They’re fitted with multiple safety valves and expansion controls to prevent over-pressurisation. All installations must be carried out by a G3-certified engineer, as required by UK Building Regulations.
