After I flush the toilet, there is the normal 7 or so inches of water in the bowl. If I come back in 2 hours, however, there is only about an inch remaining. What would cause the level of water to drop and how can I fix it? Thank you!
It could be syphonning because a lack of vent are the bowl has a crack inside leaving water out.Make sure water is up to line in tank and the 1/4″ tube is in the overflow pipe.