Why do you only leak at night?!!!

longwalks1

some of you may of read my other post about a slow water leak/dripping from 2 spotlight holes in lounge ceiling. Above it is the bathroom, with a tiled floor. We can shower and use the bathroom all day, and nothing, heating on all day, still not a drop, then at night (between 1am and 6am ish every night) each drip will fill a 1 litre jug.

It just doesnt make sense, anyone got any ideas whats going on? And why only leak/drip at night?

jcb208

Looks like you have a slow leak some where, maybe on a heating pipe that evaporates when heating is on during the day but at night drips

longwalks1

thanks jcb
so if i keep heating on at night as well, it may slow or stop the drip til i can get someone round to look at it? Been told Friday someone can come out

Jonesya

britishboy wrote: »

It just doesnt make sense, anyone got any ideas whats going on? And why only leak/drip at night?

Leak from the overflow or overflow pipework on a tank or cistern?

Had something similar with a header tank - a slow leak from a faulty cistern valve (into the tank) meant the tank was overflowing overnight and leaking from the overflow connector. During the day, when people were using water, the level rarely got up to the overflow point.

exup

Jonesya wrote: »

Leak from the overflow or overflow pipework on a tank or cistern?

Had something similar with a header tank - a slow leak from a faulty cistern valve (into the tank) meant the tank was overflowing overnight and leaking from the overflow connector. During the day, when people were using water, the level rarely got up to the overflow point.

thats what I would be looking for too

alanobrien

Its likely you have a joint somewhere that is ok during the day when its warmer but leaks when its colder at night.

Thats differential expansion, as the joint cools the component clearances increase creating the leak. Seen that before a few times and always in the winter.

longwalks1

Thanks everyone (oh and a happy new year to you all too)

Forgot to say last month i had a problem with the boiler running at a very high pressure (3bar +), and had a replacment PRV fitted, with a new bit of copper pipework to bypass the damaged one (i think)

I heard that high pressure can damage part of the boiler itself, possibly a tank or internal part, could this be causing a leak?

frank.hopper

Try pouring a few jugs of water over the bath & basin tap(s)

gas4you

Jonesya wrote: »

Leak from the overflow or overflow pipework on a tank or cistern?

Had something similar with a header tank - a slow leak from a faulty cistern valve (into the tank) meant the tank was overflowing overnight and leaking from the overflow connector. During the day, when people were using water, the level rarely got up to the overflow point.

Check the ball valve on the main cold storage tank for the hot water cylinder. This sounds like it will be the culprit.