Swapping On & Off Valve On 2 Radiators
Currently im looking at swapping 2 old on/off radiator valves for TRVs then put tados on. do i need to close all the open ones then drain system with the 2 i want to change open?
do I need to drain the full system?
whats the best way to install them?
thanks
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Answers
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great thanks for that
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