On Dec 7, 7:47*pm, wrote:
On Tue, 7 Dec 2010 14:21:36 -0800 (PST), Hank
wrote:





On Dec 7, 5:14 pm, wrote:
On Tue, 7 Dec 2010 10:30:24 -0800 (PST), Hank
wrote:

I call it toilet tide, but what is it when the level in the toilet
drops an inch or so? It is the atmospheric pressure, wind blowing
across the vent tube creating a little more vacuum, clogged vent, low
water in the back, or something else? It's no big deal, just curious.

Hank

It is virtually always vent related. You may have enough wind in the
vent to "rock" the water out or you may have bad venting allowing
water retreating from another source to suck the water out.

First to all, I don't have any animals.

Second, I can dump a half gallon of water into the toilet and the
level stays up. The water level in the tank has been consistant. There
is a minor wind of maybe 10 mph. The house is about 5 years old, but I
guess there could still some obstruction but the *other 2 toilets seem
ok.

Hank ~~~ wants to elevate to a higher level :-)

One test is to watch the water level as someone dumps a 5 gallon
bucket of water in the other toilets or drain the kitchen sink.
Even in a perfect system you might see some ripples in the water but
if the vent is plugged you might see another toilet damn near get
sucked dry.-

I'll try that to see what happens.

Thanks,

Hank