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- 28 Dec 2021
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I have purchased a Drayton Wiser kit to control my heating.
Not all of the TRV valves are the right size for the drayton trv heads.
I have seen various adverts for diferent sizes of Valve/head.
Most are measured across the diameter of the thread and the length of the valve body, and are usually quoted in rounded millimetres. When I measure mine with an electronic calliper it comes out as 27.93 millimetre, so do I look for a 28mm one.
They also say M28 x 1.0, what is the significance of the 1.0
Not all of the TRV valves are the right size for the drayton trv heads.
I have seen various adverts for diferent sizes of Valve/head.
Most are measured across the diameter of the thread and the length of the valve body, and are usually quoted in rounded millimetres. When I measure mine with an electronic calliper it comes out as 27.93 millimetre, so do I look for a 28mm one.
They also say M28 x 1.0, what is the significance of the 1.0