Plumbing problem in house?

[NFS4]

What could be causing this? Flush the toilet, go wash hands in the sink and the toilet is still running.

A minute, two minutes later toilet is still running. Go back into the bathroom and flip the faucet on for 1-2 seconds and the toilet stops running.

This is happening in two downstairs bathrooms.

Solutions?

 

[Jugernot]

I'd guess it's a pressure build up issue... when you flush the toilet and wash hands the first time, there is a pressure drop in the pipes allowing the flapper to stay up in the toilet. When you turn on the second time, the pressure has built up and the sudden drop closes the flapper.

 

[NFS4]

Originally posted by: Jugernot
I'd guess it's a pressure build up issue... when you flush the toilet and wash hands the first time, there is a pressure drop in the pipes allowing the flapper to stay up in the toilet. When you turn on the second time, the pressure has built up and the sudden drop closes the flapper.

Hmmm... I haven't noticed this issue until we started having water restrictions here in town due to extreme drought. Guess it could be a systemwide thing?

 

[spidey07]

Valve or float. Bend your float so it puts more pressure on the valve.

What's happening is what jugernot said - with the faucet running there isn't enough pressure to push through the valve. Essentially the float isn't closing it enough.

 

[Jugernot]

Originally posted by: NFS4

Originally posted by: Jugernot
I'd guess it's a pressure build up issue... when you flush the toilet and wash hands the first time, there is a pressure drop in the pipes allowing the flapper to stay up in the toilet. When you turn on the second time, the pressure has built up and the sudden drop closes the flapper.

Hmmm... I haven't noticed this issue until we started having water restrictions here in town due to extreme drought. Guess it could be a systemwide thing?

They could be restricting the pressure in the lines to combat overuse... this could cause the issues you are having. It could be cured with new flapper valves at the bottom of the toilet bowl. Home Depot or lowes should be have what you need very cheap. Less than $10 for both.

EDIT: I meant flapper in the toilet tank... not bowl.

 

[nakedfrog]

Have a look inside the tank. They're not complicated.

 

[hanoverphist]

Originally posted by: spidey07
Valve or float. Bend your float so it puts more pressure on the valve.

What's happening is what jugernot said - with the faucet running there isn't enough pressure to push through the valve. Essentially the float isn't closing it enough.

w3rd. if theres low pressure, it wont push enough water thru the valve to shut off the water. if youre haveing water restrictions they probably are lowering the overall system pressure of their distribution system. takes a ton of water to maintain 65psi around a few miles of pipes.