"Ed Sirett" wrote in message
news
On Fri, 26 Nov 2004 17:22:39 +0000, Tony Collins wrote:

OK, I've just bought some TRV's for the upstairs, but they have
different
fittings from the valves currently fitted.

New valves have 15mm compression fittings and tails for fitting to
raditor.

Rads/old valves have union fittings.

Before I drain down and find out I can't fit the new valves easily -
what
should I expect. Will the old union fittings remove easily from the
rads,
and what tool is needed?

Will the new 15mm tails have the same screw fitting (into the rad) as
the
old union types.

Thanks for your help.

Yes the old tails will have to come out.

A tool like Screwfix #11467 is needed. However since you are only going to
chuck the valve you could simply use Footprints or Stillsons on the old
tail. The key however will allow you to get a good positive grip to which
you may apply further torque as needed. They maybe a 'little' stiff, heat
will help to get the tails out but do nothing for the paint job on the
radiator.

At the left hand side you will need to push the wrench toward the wall

This is the safest method.

or get someone to half sit on the rad
whilst you pull the wrench up.

This still may bend the rad bracket.

Even if you have the room don't pull
the wrench forward or you may get more
than you were hoping for.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html