Unvented Cylinders & Water Tanks
Megaflo and unvented hot water cylinder installations for mains-pressure hot water throughout your home. G3 qualified installation. Free estimates.
What is an Unvented Cylinder?
An unvented hot water cylinder connects directly to the mains water supply, storing and delivering hot water at full mains pressure. Unlike traditional gravity-fed systems, there's no cold water tank in the loft.
The result is high-pressure hot water at every outlet — proper shower pressure, faster hot water recovery and no risk of a loft tank freezing or failing.
Benefits
- ✓ Mains pressure hot water throughout
- ✓ No cold water storage tank in the loft
- ✓ Multiple outlets without pressure drop
- ✓ Faster hot water recovery
- ✓ No risk of loft tank damage
- ✓ Compatible with solar thermal systems
What We Install
Megaflo Cylinders
Heatrae Sadia Megaflo — the most popular unvented cylinder in the UK.
Vaillant uniSTOR
Compatible with Vaillant heating systems for fully integrated hot water and heating.
Cold Water Tanks
Cold water tank removal (as part of unvented install) or new tank replacement where required.
Annual Servicing
G3 compliant annual service to maintain warranty and safety device function.
⚠️ G3 Installation Required
Unvented cylinders must be installed by a G3 qualified engineer under Building Regulations Part G. We are fully qualified and certified.
Get a Free Quote
Tell us your property size and current setup — we'll price the right cylinder for you.
07595 230287