A water heater relief-valve discharge, softener drain, and condensate line all terminate at the same floor-level receptor. What must be true of the receptor and each connection?

Giải thích

Each indirect line must discharge through an air gap into the receptor, and the receptor itself must be trapped and vented so it drains to the sanitary system without allowing sewer gas back. The air gaps keep the potable-related discharges from cross connecting. Hard connections or below-rim terminations would defeat the required physical break.