Tundish dripping of a morning

[Gt1977]

Hi everyone
I’ve noticed the tundish on my megaflow drips when hot water has been on of a morning . It stops after I’ve had a shower . I noticed the shower tap is stiffer and water jets out when switched on .

Obviously too much pressure in system but it’s still only goes to 1.5 bar . How can I resolve this ?
Is it gonna be a big problem as it only happens some mornings

Cheers

 

[John.g]

If this cylinder has a air bubble to take the expansion then possibly needs re establishing. If pressure keeps rising without cylinder heating on then probably the PRV (pressure reducing valve) if installed.

 

[Gt1977]

If this cylinder has a air bubble to take the expansion then possibly needs re establishing. If pressure keeps rising without cylinder heating on then probably the PRV (pressure reducing valve) if installed.

Cheers mate
Pressure only rises when cylinder is on