We have 4 toilets in our house. One of which for the life of me can't figure out why the water level in its toilet bowl is low. This particular toilet is a dual flush and it's located in the basement. It is worth noted that this is the only dual flush toilet we have in the house.
I have replaced both the fill valve and the overflow tube and have also tried to elevate the fill valve but nothing works. The toilet flushes just fine and there appears to be no leak. We have been in this house for 2 years now and decided it's time to figure out why.
After each flush, it seems the water rises to just a normal water level in the bowl, then it recedes a little bit after the tank is filled. I would appreciate any help here. Thanks.