FAQ — Lockshield Valve

  A drain-off fitting is an optional item which should be fitted to radiators to make it easy for Installers to remove water from the the heating system when, for example, a radiator is needed to be removed, replaced or a system is upgraded or extended. There are many ways of this being provided and it is not necessary to be fitted to every radiator, however, the more drain-off fittings that are used, the easier and more convenient it will be to remove the water.

A lockshield valve sits on the other end of the radiator to the TRV and provides one way of balancing the flow of water through the radiator so that the overall system performance is maximised. Once set by your installer, they should not be tampered with or adjusted again as this may affect the efficiency and performance of your heating system.