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WyneL · Oct 9, 2006, 09:12 PM

Hi,

Recently, when I flushed my toilet, the shower will leaks for a duration of time when the toilet tank is filling up. The leaks stop after the tank is filled. It is more severe at night than during day time.

Do you know what might be causing it?

Thank you.
Wyne L.

speedball1 · Oct 10, 2006, 06:07 AM

Originally Posted by WyneL

Hi,

Recently, when I flushed my toilet, the shower will leaks for a duration of time when the toilet tank is filling up. The leaks stop after the tank is filled. It is more severe at night than during day time.

Do you know what might be causing it?

Thank you.
Wyne L.

Hey Wyne,

Opening a faucet or flushing a toilet sends a sligh pressure variation throughout the system. However, if your shower doesn't leak all the time then the shower head's isolated from any pressure change by the shut off valves in the faucet. Do you have a special shower setup? Because I can see no way filling the toilet tank would release water from the shower head. Let's see if Griowler can come up with a solution because I'm stumped.
Regards, Tom

iamgrowler · Oct 10, 2006, 06:39 AM

This happening more frequently at night can be explained by peak and off-peak pressure drops.

City water supplies are at their highest pressure during nighttime off-peak hours.

As for the problem itself, I would need to know what brand and style of shower valve we are talking about.

Surges in pressure can allow water to get past the shower valve stops if they are already worn out -- But they would have to be so worn out that dripping and running on would occur even without the toilet being flushed.

Do you have unusually high water pressure?

Anything over 80psi is going to wreak havoc with your plumbing fixtures, as the high pressure erodes the seals from increased friction when being turned on and off.