Quote:
Originally Posted by Larchap49
Definitely can be a problem after installing low gallon use toilets if the drains don't have enough pitch. I had that happen in last house. I had to go back to 3.5 gallon toilets because the drains under slab were too flat and the solids would stop due to lack of water to keep everything moving.
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The 3.5 gallon toilets aren't sold in the US as far as I'm aware. Where did you get one of those?