Hot water dribbles at bath tap for 5-minutes

[b21playa]

Hi all

Water dribbles at the tap when open and take approx 5mins for it to flow fully. We have a gravity fed tank. Weird thing is the basin tap is fine.

what could be the issue?

 

[Harry Bloomfield]

Hi all

Water dribbles at the tap when open and take approx 5mins for it to flow fully. We have a gravity fed tank. Weird thing is the basin tap is fine.

what could be the issue?

Airlock somewhere?

 

[b21playa]

Thanks I thought that, and have bridged hot & cold w/m outlets to try and get rid of the air. Seems to work for a short while and then back to waiting

 

[dal5band]

Is there a high point in the hw pipe to the bath where air may accumulate ?

 

[Harry Bloomfield]

Thanks I thought that, and have bridged hot & cold w/m outlets to try and get rid of the air. Seems to work for a short while and then back to waiting

Yep - airlock. A bubble of air develops in the hot water tank, you turn the tap on and the bubble goes into the pipe, where it sticks. Get the routing of your hot pipe to the bath, does it go up, over, then down to the bath?

 

[b21playa]

Yep - airlock. A bubble of air develops in the hot water tank, you turn the tap on and the bubble goes into the pipe, where it sticks. Get the routing of your hot pipe to the bath, does it go up, over, then down to the bath?

Hi

taken panel off and the pipe from cyclinder (downstairs) just comes up straight into the bath

 

[Harry Bloomfield]

Hi

taken panel off and the pipe from cyclinder (downstairs) just comes up straight into the bath

Bet it does go up, then back down somewhere.

 

[b21playa]

Bet it does go up, then back down somewhere.

Possibly somewhere behind the tiles or in the boxing. To be honest it’s an old system which needs replacing but slowly working my way through the house

 

[JohnD]

When you screw the tap head up and down, does the hot one feel exactly the same as the cold one, and take the same number of turns?

 

[Harry Bloomfield]

Might the tap jumper be sticking closed, until the hot water gets through and frees it?

 

[b21playa]

When you screw the tap head up and down, does the hot one feel exactly the same as the cold one, and take the same number of turns?

It’s a shower mixer tap now. Same happened when I had individual taps