Tel:  01295 722700
07920 098041

Unvented Cylinders

An Unvented cylinder functions by connecting the cylinder directly to a 22mm* rising mains. There are no storage tanks, feed and expansion tanks or open-vent pipes associated with unvented cylinders.

Instead, a diaphragm inside a pressure vessel mounted on top of the cylinder flexes to take account for the expanding water. If the vessel fails, an expansion relief valve protects the system by releasing water via a discharge pipe.

C.Wyatt Gas Services | VAT No: 988235078 | Gas safe no. 513476
Gas Safe Register Worcester Bosch Glow-worm Vaillant