adventurousrookie
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I removed an older tiled walkin shower and plastic base pan to reveil the flooring beneath as concrete slab and a caste iron drain. The previous pan just dropped in pvc pipe into cast iron drain. And you can see where the water backed up around the drain. I would prefer to custom tile the base, but seeing as the drain pipe is 4" cast iron, what advise do you have for building a drain for a custom tile shower base?