Thermostatic Radiator Valve - TRV

Postby reluctant plumber » Thu Dec 30, 2010 1:54 pm

i have a two pipe central heating system with TRVs fitted to each radiator, if i want to change a complete TRV out for a new one will i have to drain down the central heating system or is there another solution
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Simply Build It

Postby plumbbob » Fri Dec 31, 2010 12:45 am

You don't necessarily have to completely drain down the system, but exactly what needs to be done depends whether the system is pressurised or not.
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