The types of joints permitted above ground inside of a building are:
- Cast iron hub stack to plastic with plastic to soil adapter;
- Cast iron hub stack to copper with adapter, lead and oakum joint;
- Cast iron hub stack to steel pipe, lead and oakum joint;
- Cast iron no-hub stack to plastic or copper with no-hub coupling;
- PVC connected to ABS with male and female adapters.
- No-hub coupling shall be permitted for ABS connected to PVC.
For repair of underground storm, sanitary or combined main drain lines, a double hub cast
iron fitting shall be permitted with the approval of the Department. Such joints shall be properly caulked and
supported.
In replacing a broken house trap, an approved mechanical type fitting shall be permitted on one
side of the trap.
Under severe conditions, two fittings shall be permitted, with approval of the Department.
The use of two fittings shall require concrete encasement on the street side.