Unvented Cylinder Installation in Weston-super-Mare
Experience powerful, mains-pressure hot water throughout your home. Our G3 qualified engineers install and service unvented hot water cylinders to the highest standards.
Gas Safe Registered
Fully certified engineers
24/7 Emergency Service
Always here when you need us
Safe Hands Warranty
Extended protection with annual service
High-Performance Hot Water for Your Home
Unlike traditional vented cylinders that rely on gravity and a cold water tank in the loft, unvented cylinders are connected directly to the mains water supply. This means hot water is delivered at full mains pressure to every outlet in your home – giving you powerful, consistent performance that transforms your daily experience.
Mains Pressure Hot Water
Powerful hot water at every tap and shower throughout your home.
Multiple Showers
Run multiple showers simultaneously without losing pressure.
No Pump Required
Eliminate the noise and maintenance of shower pumps.
Renewable Ready
Compatible with solar thermal panels and heat pumps.
The Difference Mains Pressure Makes
The main benefit of an unvented system is simple: powerful hot water everywhere. Traditional gravity-fed systems often struggle to deliver adequate pressure, especially to upstairs bathrooms. Many homeowners add pumps to compensate, but these add noise, require maintenance, and increase energy use.
With an unvented cylinder, you eliminate these problems. Hot water flows at mains pressure naturally, giving you:
- Powerful, invigorating showers without a pump
- Quick-filling baths, even on upper floors
- Consistent pressure when multiple outlets are in use
- Better performance from high-end showers and taps
- No loft tank to freeze, leak, or attract contamination
- More usable loft space
Safety and Compliance
G3 Qualified Engineers
UK regulations require that unvented hot water cylinders are installed and serviced only by engineers holding the G3 (Unvented Hot Water) qualification. All Kesselmann engineers are fully G3 qualified, ensuring your installation meets all safety standards and building regulations.
Because unvented cylinders operate under pressure, they incorporate multiple safety devices:
- Temperature relief valve – releases water if temperature exceeds safe limits
- Pressure relief valve – releases water if pressure exceeds safe limits
- Expansion vessel or internal air bubble – accommodates water expansion as it heats
- Tundish – visible discharge point to alert you if safety valves activate
Annual servicing is essential to test these safety devices and ensure they’ll work correctly if ever needed. This servicing requirement is a condition of most manufacturer warranties.
Installation Process
We supply and install cylinders from leading manufacturers and can recommend the right capacity based on your household size and hot water usage patterns. Whether you need a compact 150-litre unit for a small household or a larger system for a busy family home, we have you covered.
Renewable Energy Compatibility
Ready to upgrade your hot water experience? Call Kesselmann Heating and Plumbing on 07388 494676 to discuss unvented cylinder options for your home.
Frequently Asked Questions
An unvented hot water cylinder is a pressurised system that stores hot water fed directly from the mains water supply, rather than from a cold water tank in the loft. This delivers mains-pressure hot water to all your taps and showers.
Key advantages include: powerful mains-pressure hot water throughout the home, no need for a cold water tank in the loft (saving space and eliminating freezing risks), equal hot water pressure on all floors, better performance for multiple simultaneous showers, and compatibility with modern power showers.
Yes, significantly. Because an unvented cylinder delivers water at mains pressure, you'll enjoy powerful showers without the need for a pump. This is one of the main reasons homeowners upgrade to unvented systems.
Yes, adequate mains pressure and flow rate are essential. We'll test your water supply during our survey to ensure it meets the minimum requirements. In most areas, mains supply is sufficient, but if not, we can discuss alternatives.
Unvented cylinders must be installed by engineers who hold a G3 qualification, which specifically covers unvented hot water systems. This is a legal requirement in the UK. All our engineers are G3 qualified and fully insured.
Annual servicing is essential for unvented cylinders. During a service, we test all safety devices (temperature and pressure relief valves, expansion vessel), check for leaks, and ensure the system is operating correctly. This is both a safety requirement and necessary to maintain warranties.
Yes, when properly installed and maintained. Unvented cylinders have multiple safety devices including temperature relief valves, pressure relief valves, and expansion vessels. Annual servicing ensures these devices are working correctly.
Unvented cylinders can be installed in any suitable location including airing cupboards, utility rooms, or purpose-built enclosures. They need space around them for servicing access and must have a tundish (safety discharge) that routes to a visible external drain.
A straightforward replacement of an existing cylinder typically takes 1 day. If we're converting from a vented system, the work may take 1-2 days depending on the complexity of the pipework modifications required.
Yes, many unvented cylinders are designed with dual coils or immersion heater connections specifically for renewable energy sources. This makes them an excellent choice for homeowners looking to reduce their carbon footprint.
Ready for Better Hot Water?
Experience the difference of mains-pressure hot water throughout your home. Contact our G3 qualified engineers today.