In an earlier contribution to this discussion,
Red wrote:

"Set Square" wrote in message
...

When this problem occurs, what happens if you turn the mixer to full
hot? Do you get coolish water coming out, or nothing?


Turn the mixer to cold and you get cold water. Turn to hot and you
get a little dribble at first, but then nothing. I think i may have
been wrong about the seperate feed for the shower. If you put the
shower onto hot, and turn the hot bath tap on and off, it forces a
dribble out out the shower. I can't see where the showers hot pipe
comes from. It dissapears under some boarding halfway accross the
loft.

The shower worked last night. But this morning back to nothing.

Appreciate your time with this. Any more ideas?

Thanks,

Red.

(PS Im posting this from a different PC, so maybe the time will be
correct.)

If you have a tankful of hot water but it doesn't get to the shower, this
indicates a blockage or air lock in the pipe between the tank and the
shower - or something wrong with the mixer valve itself.

Presumably the flow at the other hot taps is ok?

Can you turn off your hot water by means of a gatevalve in the cold feed to
the hot tank? If so, turn this off and disconnect the hot feed at the
shower. Get someone to turn it on again and see whether you get a good flow
out of the open pipe.

If you do, it's the mixer valve that's at fault. If you don't, it's the
pipework.

If it's the pipework, do you have a means of temporarily connecting a cold
mains feed to the open end of the shower's hot supply pipe? If so, do this
and force some water back through the pipework and hot cylinder into the
header tank (but not enough to make the latter overflow!). This should clear
any crud or airlocks.
--
Cheers,
Set Square
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