Question: are all bathtub drain threads the same?
Answer: One of the most confusing and annoying plumbing problems is replacing the bathtub drain (called a plug) that screws into the base (called a shoe). There are two common thread types (16 and 11 1/2 Threads Per Inch), and one uncommon one (14 TPI). We sell a variety of shoe adapters, some are only available from us.