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P3003.2 Prohibited Joints
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Running threads and bands shall not be used in the drainage system. Drainage and vent piping shall not be drilled, tapped, burned or welded.
The following types of joints and connections shall be prohibited:
- Cement or concrete.
- Mastic or hot-pour bituminous joints.
- Joints made with fittings not approved for the specific installation.
- Joints between different diameter pipes made with elastomeric rolling O-rings.
- Solvent-cement joints between different types of plastic pipe except where provided for in Section P3003.13.4.
- Saddle-type fittings.