Plumbing fixtures or other
receptors receiving the discharge of indirect waste pipes shall
be approved for the use proposed and shall be of such shape
and capacity as to prevent splashing or flooding and shall be
located where they are readily accessible for inspection and
cleaning. No standpipe receptor for a clothes washer shall
extend more than 30 inches (762 mm), or not less than 18
inches (457 mm) above its trap. No trap for a clothes washer
standpipe receptor shall be installed below the floor, but shall
be roughed in not less than 6 inches (152 mm) and not more
than 18 inches (457 mm) above the floor. No indirect waste
receptor shall be installed in a toilet room, closet, cupboard,
or storeroom, or in a portion of a building not in general use
by the occupants thereof; except standpipes for clothes washers
shall be permitted to be installed in toilet and bathroom
areas where the clothes washer is installed in the same room.