A plumber replaces a water heater in a finished basement over a slab where a leak would not damage anything below, but the local code still requires spill protection. If a drain pan is installed, its drain must:

Giải thích

When a drain pan is installed, its drain line must run by gravity to an approved discharge point where a leak becomes readily visible, so the problem is noticed early. It must not tie directly into the sanitary drainage system without proper separation. Visibility of the discharge is the key requirement.