Hot Water Cylinders

What is a vented hot water cylinder?
A vented hot water cylinder needs a water storage tank fed from the mains, situated in the loft. Gravity takes water down to the hot water cylinder, often in an airing cupboard, by means of a vent pipe. In the cylinder the water is heated to supply taps or radiators or is stored for later use. As water is heated it expands, so the vent pipe is needed, allowing it to overflow to the tank in the loft. This system relies on gravity for the flow rate of water to taps. If the water supply is disconnected you will still have a tank full of water.

What is an unvented hot water cylinder?
The unvented hot water cylinder does not require a storage tank and is connected directly to the mains supply. When the water is heated, any excess will be diverted to an expansion tank, which is part of the same system. This type of heating system needs less space and as the cylinder is supplied directly by the mains, it is likely to have stronger water pressure. Although this type of system does have advantages it is not always compatible with certain other appliances such as power showers. Thaw Out heating engineers can advise about which system is the best suited for any type of property and can undertake installation work on both types of system.

Vented & unvented hot water cylinder repairs
Installation of a vented system requires more components but can be less expensive. However, an unvented system, which will need less space, is more complex and could work out to be a more expensive installation. Both cylinder systems can be equally serviced and repaired if necessary. The vented system may at some stage require more repair or replacement works due to the additional tank and vents. There are positives and negatives for both systems but both work effectively, providing a steady supply of hot water and heating.

Why choose Thaw Out for vented & unvented hot water cylinder repairs and installation services?
Thaw Out Heating & Plumbing engineers are industry trained and fully qualified to carry out all types of vented and unvented hot water cylinder repairs and installations for domestic clients. We offer a reliable and fully guaranteed hot water cylinder repair and installation service to customers anywhere in the South West London area. We are trusted and experienced tradesmen, and we take pride in the job and a job done well. We offer:

  • 24-hour emergency call out for vented and unvented hot water cylinder repairs
  • Full vented and unvented hot water cylinder repairs and installation service
  • Comprehensive vented and unvented hot water cylinder repairs and installations in the South West London area.
  • 100% guarantees on all vented and unvented hot water cylinder repairs and installations