Water pressure - strange goings on !

[Mattwrx]

Hi all,

I live in a 8 yr old house with 3 bathrooms. This will sound really strange but when one of the toilets is flushed, they will start to fill up and overflow for a few minutes.
If we run a bath, then all 3 toilets will also run and overflow. What's going on... Help !
We have a boiler I the garage, hot water tank in the upstairs airing cupboard and the water tank in the loft. I would say that we don't have the best water pressure and the water board have been out a few times... They say it's within tolerance though. I think it's low because it really drops when two taps are on at the same time, or a tap is on and someone flushes a toilet.
I've spoken to a few plumbers and this has baffled them all, any ideas ?

Is this the water pressure, the toilets, some valve in the loft ?

If I could find a plumber in the West Mids area that knew the problem I'd happily pay to have this fixed.

Many thanks.

 

[lame plumber]

probably high water pressure issues, chat with a plumber on site

 

[Mattwrx]

Thanks, if it's high water pressure wouldn't I have good pressure at the tap ? I can't even use a garden hose if someone has a tap on in the house.

 

[lame plumber]

didnt read whole post tbh, but you need to check all on correctly and take it fm there. I did a boiler recently that had been in 15 years, no flow of any account over 15 years, on putting new one in, brilliant flow, reason I turned on the stopcock under the sink

 

[stevetheplumber]

also if the pump feels much hotter than the pipework its a sign its buggered

 

[Mattwrx]

Thanks guys, water pump is fine so ruled that out. Issue seems to be connected to the cold water supply only. When we run a bath we often turn the water supply off to the toilets to stop them running. I should have mentioned that this only started a few weeks ago.

 

[basildog]

Halloween ?

 

[Mattwrx]

Halloween ?

Damn those ghosts.