Hi. My name is Elliot.

I have two Mansfield toilets, both of which only empty only half the water from the tank when flushed. That's not enough pressure to keep toilet from clogging. I properly replaced the flapper seal, but that didn't solve the problem. Could someone please suggest something else I can do? Thank you.

First tell us how full the tanks get compared to the overflow tune, where is that water level? Also, when you replaced the flapper did you use the exact same brand and type flapper?

It empties only 1/2 way because the flopper is designed the way, so it closes down quickly. Today, toilets have to flush anywhere from 0.98 gal to 1.6 gal per flush. Tank holds 3.5 gal of water. That's why every time you flush - you empty only portion of the tank.

If you want more water per flush, go to Home Depot and purchase old-fashioned flopper. It will stay in open position longer, allowing all water to exit the tank

Hope that helps

Milo

Some flapper have a styrofoam float on the chain that you can adjust to make it stay open longer. You can make your own float if you can find a piece of styrofoam.