Angled Lockshield

A lockshield valve is the connection between the radiator and the return pipe. It is used to switch off the radiator for installation or maintenance and as an option can be used to balance the radiators in the system so that they all heat up at the same rate. The lockshield valve should be opened at increasing amounts the further the radiator is from the boiler. Suitable for two-pipe, fully pumped systems up to 10 bar static pressure


  • 15mm copper connections
  • 6mm of play of tailpiece enables simple retrofit


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Our products are stocked in many home and DIY outlets across the UK.
Alternatively you can buy this product directly from the following websites.


Honeywell Home Heating

We have a range of heating controls designed to improve the efficiency of your home heating.

Easy to install and use

Accurate, robust and reliable, these TRVs are designed to suit any décor and are ideal for retro fit.

The TRV can be installed on either side of the radiator, in a vertical or horizontal position.

Instruction Manual