Hot Water tap running dry

[thamc05]

I've recently had an En suite consisting of a shower/sink and toilet fitted off one of the 1st floor bedrooms.

The hot water supply to the sink and shower has stopped working. You open the tap and a few warm drops come out. The pipework for both the hot and cold is fed via the loft, where the hot water supply has been teed into the overflow pipe from the hot water cylinder (which is in the main bathroom on the same floor as the on suite).

The hot water feed / overflow pipe was cold to the touch so I'm assuming there was no water in it, two questions please.

If it is air that has got into the pipe, how do I bleed it ?
There is a shower pump in the main bathroom, could this be the cause of air getting into the overflow ?

Many thanks.

 

[kevplumb]

what are you calling the "overflow pipe" a cylinder does not have an overflow View media item 16751

 

[thamc05]

Sorry, should have read 'vent Pipe' the one that goes into the top of the cold water tank.

 

[kevplumb]

The pipework for both the hot and cold is fed via the loft, where the hot water supply has been teed into the overflow pipe from the hot water cylinder (which is in the main bathroom on the same floor as the on suite).

so correct me if i'm wrong (its not unknown)

you have the hot supply connected to the hot cylinder vent in the loft ?

and a shower pump on the same cylinder ?

 

[thamc05]

you have the hot supply connected to the hot cylinder vent in the loft ?
Yes

and a shower pump on the same cylinder ?
Yes

 

[Gasop]

you have the hot supply connected to the hot cylinder vent in the loft ?
Yes

and a shower pump on the same cylinder ?
Yes

 

[Bahco]

Is the water in the cylinder hot and also is the feed tank full of water?

 

[thamc05]

Yes the water in the cylinder is hot, all other hot taps have running hot water and yes the feed tank is full.

 

[thamc05]

you have the hot supply connected to the hot cylinder vent in the loft and a shower pump on the same cylinder ?

So tell me guys, is there an issue with it set up like this please ?

 

[seco services]

you've answered your own question.
its connected to the vent pipe. its probably drawn air in.

 

[kevplumb]

err just a bit

when you turn a tap on all you will do is drain the vent pipe

 

[Gasop]

err just a bit

when you turn a tap on all you will do is drain the vent pipe

Not possible.

But if the tee is very high then air can be drawn in when the pump is in use causing air to be drawn in and causing an air lock.

 

[WDIK]

effing bloody classic, sorry nurse ive leaked again,

no please not the rubber pants again