G3 Unvented Hot Water Cylinder Installation
Across Frome, Somerset & Wiltshire
Fully certified, highly responsive local plumbers specialising in high-pressure hot water systems.

A successful installation always begins with a thorough site survey. We first test your incoming mains water supply to check both the pressure and flow rate, ensuring your property is suitable for an unvented system. If everything is up to standard, we help you select the correctly sized, WRAS approved unit, such as a high-quality Megaflo installation. Our complete service includes carefully fitting all essential safety components, including the expansion vessel, pressure reducing valve, and the vital Tundish installation. Should we detect any issues with your incoming supply, we can also advise on necessary water pressure repairs before the cylinder is fitted.

Upgrading to an unvented hot water system offers exceptional benefits for busy households. Because these systems are fed directly from your mains water supply, you can enjoy powerful, mains-pressure hot water in every bathroom simultaneously—perfect for modern thermostatic mixer showers. Furthermore, unvented cylinders eliminate the need for a traditional cold water tank in your loft. This not only frees up valuable storage space but also drastically reduces the risk of frozen or burst pipes during the harsh winter months. For those looking to modernise their home, it is a highly efficient and space-saving solution.

When it comes to unvented hot water systems in Frome, safety and compliance are absolutely critical. Under G3 Building Regulations, it is a legal requirement that only a specifically qualified G3 certified plumber installs, services, or repairs these highly pressurised units. At BC Plumbing, our team holds full G3 credentials and comprehensive Public Liability Insurance for your complete peace of mind. We are also acutely aware of local geographical factors, such as the hard water scaling common across Somerset and Wiltshire. We always use WRAS approved valves and components to ensure longevity and robust protection against scale buildup.

Many homeowners ask us if their property can support an unvented cylinder. The answer largely depends on the strength of your incoming mains water. If your pressure is too low, the system simply will not operate efficiently. During our initial visit, we will assess your pipework, checking the condition of your main stopcock and isolation valves to ensure you have optimal control over your water supply. If an unvented system is not the right fit, we can expertly guide you through alternative options or provide dedicated unvented cylinder repair to keep your existing setup running smoothly.