Homeowner Forum / Plumbing / June 2009

Most plumbers wouldn't think in terms of a "main drain" unless they
were talking about a house.  I'm assuming there is no toilet hooked on
to this drain, and I assume it's just the drain for your apartment.
If these things are true, then, just call it the drain for the tub and
sink.  The main difference the plumber would need to know is that it's
just a small pipe instead of one large enough to carry sewage.

But piping in a large apartment building can be tricky, and your pipes
might tie into other pipes.  In any case, it's a headache for your
landlord (unless you own your apartment).

Just for fun, those of use in the rest of the USA might be curious how
much plumbers in Manhattan charge by the hour.  Write back and let us
know.

The term would be "horizontal branch drain" off a branch interval of
the soil stack.

kenny b