Unvented Cylinders

What is an Unvented Cylinder?

Unvented cylinders are connected directly to your mains water system, unvented cylinders ensure copious amounts of stored hot water is available on demand and they operate at mains pressure to offer much higher flow rates.

No need for a water tank

Unvented Cylinders take up less space, giving you flexibility on where you can install.

Fast Filling Baths

Unvented Cylinders will ensure that you can fill up your bath just as quick as traditional heating systems.

Utilizes existing pipe work

Unvented Cylinders use existing pipes, this saves installing time and space.

Drinking water at all taps

Unvented Cylinders provide drinking water in all taps, including bathroom taps.

Contact Us

Our services include:

Unvented Cylinder Installation

Unvented Cylinder Repairs

Unvented Cylinder Servicing

Contact Us

Unvented Cylinders

Unvented Cylinders work directly from the mains water and enables hot water to be supplied and because the pressure comes direct from the mains water the flow rate is much better compared to a vented water system. Unvented hot water systems have safety devices inbuilt to help it cope with the high pressure and expansion of water.


You may find you have a small tank sitting in the loft for venting and feeding your central heating, however unvented cylinders provide hot water constantly at mains pressure, so there is no requirement for a cold water storage tank and the extra pipework to link it up and because you’re relying on the pressure from the mains rather than just gravity, you can situate the hot water cylinder in almost any location.

Contact Us

Neptune Direct Unvented Cylinder

Direct hot water cylinders for electric water heating, designed with quality and performance in mind, ranging from 120 to 300 litres capacity

Contact Us

Neptune Indirect Unvented Cylinder

Ranging from 120 to 300 litres capacity, our premium indirect hot water cylinders with outstanding efficiency ratings

Contact Us

Dimplex Edel Hot Water Heat Pump

The Edel range of heat pump cylinders comes in two sizes, 200L and 270L. The inner vessel is made from Stainless Steel with a Hot Water Heat Pump mounted on top.

Contact Us
Share by: