Hi Guys,

Just finished installing a new shower pump and thermostatic shower value. 
Hot water is tee'd off the cylinder and cold is on a single continuous run 
from the cold tank in the loft. Everything worked fine during the tests so 
Ive now tiled the walls.

When I've tried the shower again I have no cold feed. The hot is fine and 
running the shower it gets hotter and hotter until the value kicks in then 
stops at which point if I turn the temperature up it comes on again then 
cuts out when it gets to the hotter temperature.

I think when I drained down to do some other work after connecting the cold 
feed I've intruduced air into either the cold pipe to the pump or from the 
pump to the thermostatic value and now think Im stuck with an airlock.

Any suggestions on how to clear it? and how to stop if from happening 
again - Id really rather not rip the tiles off the wall :-(

TIA

Fit a non return valve then open up the shower and disconnect the cold pipe
to allow water to run through

You should be ok then

"Clueless"  wrote in message
news:tYX4e.5359$G8.1096@text.news.blueyonder.co.uk...

> Hi Guys,
>
> Just finished installing a new shower pump and thermostatic shower value.
> Hot water is tee'd off the cylinder and cold is on a single continuous run
> from the cold tank in the loft. Everything worked fine during the tests so
> Ive now tiled the walls.
>
> When I've tried the shower again I have no cold feed. The hot is fine and
> running the shower it gets hotter and hotter until the value kicks in then
> stops at which point if I turn the temperature up it comes on again then
> cuts out when it gets to the hotter temperature.
>
> I think when I drained down to do some other work after connecting the
cold
> feed I've intruduced air into either the cold pipe to the pump or from the
> pump to the thermostatic value and now think Im stuck with an airlock.
>
> Any suggestions on how to clear it? and how to stop if from happening
> again - Id really rather not rip the tiles off the wall :-(
>
> TIA
>
>
>
>

"Pete"  wrote in message 
news:OXq5e.15137$pA6.9330@newsfe1-win.ntli.net...

> Fit a non return valve then open up the shower and disconnect the cold 
> pipe
> to allow water to run through
>
> You should be ok then


Cheers Pete,

I sorted it last night - The airlock was on the cold feed, I ripped the pipe 
out the header tank put it vertical and poured water in manually with the 
shower value on and the pump/ hot feed off then closed the shower value 
fully and reconnected.  I was trying to keep the pipe run without anything 
between the tank and the pump but I'll add a Tee and value to act as venting 
pipe I think to avoid future problems.