On Wed, 24 Nov 2004 13:42:23 +0000 (GMT), "Dave Plowman (News)"
wrote:

In article ,
Keith Moore wrote:
My question is should the inlet or outlet valve on a radiator be used
as the LSV?

They should simply be fitted to the end of the rad which is most
accessible for the user.

It really doesn't matter - although on some it might make a slight
difference to noise.

Although many modern ones are bi-directional (can be put on flow or
return) there are still some around with an arrow indicating the flow
direction that must be followed. Putting these on the wrong way end can
cause water hammer and/or lead to premature failure of the valve. If you
have a directional one that is the wrong way for the end you want to fit
it, you can reverse this by having the control head horizontal instead
of vertical, but it is not ideal for aesthetic reasons.

However, if you intend fitting TRVs at some point which *usually* go on
the input, it might make sense to key down the output valves and retain
these settings.

???

Phil
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