I see that many of your TRV valves offer a ‘Frost Protection’. What does this mean?

‘Frost Protection’ valves offer exactly that, protection for your heating system from the effects of frost. Most of our TRV (thermostatic) cast iron radiator valves offer this and will therefore, continue to work when in the fully turned off position. This is to ensure that if, you are away and your have turned all your valves to the fully wound in – Off position and the temperature drops to the levels above, the valves will automatically open to help prevent the heating system from freezing and causing damage. Obviously, your heating needs to be on and operating for this to work. In view of this protection, please remember that the valves may not fully shut off when in the fully wound in – Off position, so installing an inexpensive in-line isoltaion valve may be helpful when plumbing in your radiators. We also offer decorators caps under the Accesories & Spares tab above for the Bentley Range to fully shut off these valves.