10:41AM | 06/26/05
Member Since: 06/25/05
3 lifetime posts
I have a Mansfield 1.6ga elongated toilet. Problem I am having is the water level in the bowl gradually drops to just below the water flow hole at the bottom ot the bowl.

No water is leaking from the tank and no water is leaking around the bowl. Why would the water level in the bowl drop. I have another bathroom connected to the same drain less than 6 feet away and it does no do this. Thanks for your assistance.


05:59PM | 06/26/05
Member Since: 01/28/03
693 lifetime posts
Could be your toilets or other fixtures are not vented adequately and the other toilet or other fixtures is drawing air from this one.

Could also be a hairline crack in the bowl which is leaking into the waste pipe unnoticeably.


04:53PM | 06/27/05
Member Since: 06/25/05
3 lifetime posts
I have not checked the vents yet, would the vent cause the water level to still be drawn down when other fixtures are not in use? Also, the toilet is secure and has not been snaked or hit, so I don't think a crack is likely, Possible but not probable.

It has been in place for approx 5 yrs and this problem started about 2 weeks ago.

Thank You for you assistance.


04:34AM | 06/29/05
Member Since: 01/28/03
693 lifetime posts
Blocked or improperly installed ventilation can cause water levels to drop when other fixtures are used.

It is not unusual at all for toilet bowls to crack suddenly and without reason due simply to manufacturing defects or stress (like someone standing on the fixture).


05:15AM | 06/30/05
Member Since: 08/29/04
227 lifetime posts
Absolutely right. If you flush a toilet in a basement, and you have a blocked vent, it will try to draw air from an upstairs fixture. The funny thing about air, is it has volume. So if you put water into a system (which has weight) it will push the air ahead of it, leaving a vacuum behind it. The missing air has to be replaced. With a blocked vent (often a birds nest or dead animal) your system will not function properly.

Raymond VinZant Plumbing Prof.


08:01AM | 07/04/05
Member Since: 06/25/05
3 lifetime posts
Since the bowl was flushing properly I did not snake it. Well, for the sake of elimination, I snaked it and out came small peice of guaze, (like bandage guaze) it was not not very big and I don't know where it had lodged, but after it came out, the bowl did not siphon down. It has worked properly since.

Thank you folks for responding, I now know where to go for help for all my home questions.


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