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What are thermostatic and manual radiator valves?

 What are thermostatic and manual radiator valves?

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Thermostatic radiator valves

Thermostatic radiator valve Thermostatic radiator valves, known as TRVs, cut off the flow of water to a radiator automatically when a set maximum temperature has been reached.
Thermostatic radiator valve They turn the flow of water back on again when the radiator begins to cool.
Thermostatic radiator valves They are available in many sizes and configurations – straight, vertical angle and horizontal angle – to suit various situations.
Thermostatic valve dial The temperature is set on a dial on the thermostat.
Thermostatic valves can save money on heating bills The automatic switching off of individual radiators can save money on your heating bills.

Manual radiator valves

Turning manual valve by hand A manual radiator valve has to be turned on and off by hand.
Manual radiator valve Most central heating systems have at least one radiator fitted with a manual valve.

This is to ensure there is still somewhere for the hot water to flow to and from if all the thermostatic valves are off at the same time.

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