I had a new toilet installed and it leaks at the base. What’s the problem?
A leaky toilet base is often caused by a flange not being sealed all the way. The top of the flange that the toilet sits on must be even with the floor. If the floor is uneven or if the flange is too high, then the toilet might have to be shimmed. If the flange is too low, place a wax ring on the bottom and another one on top with the plastic horn insert.