I have gas central heating served by a valiant boiler.

[Tina]

When I'm in bed at night I hear what sounds like a tank being filled every 30 minutes or so when I checked my water meter water is being used throughout the night ...any ideas what this is

 

[kozak1968]

Do you have a water softener?

 

[plumber0808]

You have a leak somewhere. Maybe a overflow running?

 

[Tina]

Don't know ???

 

[Tina]

I,ve looked for leaks and running water but can't find any my bedroom is above my bathroom so the noise seems to come from below

 

[Dotty]

Does water continually run down the inside of your toilet pan?

 

[Tina]

No I have a bath sink and separate shower in there nothing seems wrong in there

 

[plumber0808]

Possible leak under floor?

 

[Tina]

As i only seems to hear this happen at night when I'm in bed and the heating is off could it be anything to do with the outlet pipe that goes from the boiler to the drain ?

 

[michael c]

It is possible but unlikely, this would also happen during the day. I would expect a leak but what throws me is the fact you say it fills every half hour or so, this if the sound is beneath you suggests the toilet as it would need to be a ball valve filling.

 

[michael c]

As croppie says check inside of toilet pan as new toilets will overflow or partially leak into the inside of the bowl. This could be a very small leak to only fill every half hour. You may simply not notice during day due to toilet usage and other sounds.

 

[DirksPlumbing]

I would first go with Croppies suspicion.

Nightly ist often the case when you have ball valves in the cistern/tank. When the pressure rises at night these might not close properly anymore and cause an overflow.

Just a bylaw kit can cause this behaviour as well as it syphons ~2" away and then fills up again if entry valve is passing/ wrongly set up.

Added: leaks tend to give a rather constant trickle.

 

[Tina]

I have checked the toilet and you are correct there is a very slow drip into the pan how do I fix this ??

 

[DirksPlumbing]

I have checked the toilet and you are correct there is a very slow drip into the pan how do I fix this ??

Can you describe what type of outlet valve you have got? is it connected via cable/hose to a flush button? Or has it a chain? Or is it a syphon with a lever handle?

 

[Dotty]

Can you post a picture of the inside of your toilet Tina?