Join me as I take the overflow apart and make a repair with just a 6 in 1 screwdriver. Subscribe. 11 mars 2022 · If it turns out your bathtub drain is responsible, you’ll need to determine if leaking is coming from the overflow drain (located on the wall of the tub), or the waste drain (located on the floor of the tub.) For tips on how to repair the waste drain, check out our article 6 Steps to Eliminate Bathtub Drain Leaking.