Hi, can anyone identify this TRV and what size allen key it uses? A 2mm spins and a 2.5mm doesn't fit.
The rad isn't working and I'm trying to find the blockage. Normally I'd start by checking the TRV pin but I can't get the head off.
If I need to replace, any suggestions on a straight TRV that has a 3/4 union on the tail so I don't need to change the tail out? 1/2 union seems to be more common now.
Thanks
The rad isn't working and I'm trying to find the blockage. Normally I'd start by checking the TRV pin but I can't get the head off.
If I need to replace, any suggestions on a straight TRV that has a 3/4 union on the tail so I don't need to change the tail out? 1/2 union seems to be more common now.
Thanks
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