wrote:

3 storey house, top floor rads stone cold, as are pipes in and out.
The feed-and-expansion is working fine, pressure is 1.5 bar in the
system, no bleeding necessary. Only 1 rad on ground floor, 3 on middle
2 on top - botoom two fllors rads are working fine.

Not sure I follow - you mention pressure in the system - this suggests a
sealed system[1], but then also talk about a "feed and expansion" (I
presume tank). What sort of system have you actually got?


[1] http://www.makewrite.demon.co.uk/SealedCH.html

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/