DIY Doctor

Radiator Thermostatic Valve size

Postby markyuk » Thu Jan 07, 2010 10:37 pm

Hello just trying to find out some info

any one know what size allen key i have to use to get the bottom pipe out of the rad so i can fit a thermo valve as it has a allen key head inside the pipe, and i need to get it off to put the new one in that came with the thermostaic valve as new vale is 15mm going in to rad.
old one looks like a 22mm size union on it
many thnaks
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Simply Build It

Postby chris_on_tour2002 » Thu Jan 07, 2010 11:30 pm

go into any plumber's merchant and ask for a radiator key - don't confuse it with a bleed valve key. should be a standard size, though there are some oddities out there - if so get a universal radiator key.

this is a standard key (or spanner as they call it here): ... or-Spanner

universal key looks like this and should fit all rads:

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Postby tsb » Thu Jan 07, 2010 11:35 pm

Off the top of my head ,I can't think of the size but I know in my area the local pound shops sell them. And before you ask, they are a pound
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Postby rosebery » Thu Jan 07, 2010 11:39 pm

Radiator Spanner (Screwfix do 'em) or;

14mm allen key usually works or;

A large flat bladed screwdriver

Top one is the proper item but the others work too.

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Postby markyuk » Fri Jan 08, 2010 11:06 pm

thanks very much indeed, went to screwfix and brought one perfect

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