Intended for use with DWV systems, no-hub couplings are used to join cast iron soil
pipe that does not have the traditional Hub and Spigot. They are normally installed
using a torque wrench. Generally, they have more clamps and provide a greater band
load than standard no-hub couplings.
Cast Iron Drain, Waste, Vent/Sewer/Drainage SHORT FORM SPECS
Cast Iron Soil Pipe [71k pdf]
Cast Iron Drain, Waste, Vent/Sewer/Storm LONG FORM SPECS
Hubless CISPI 310 Coupling [565k pdf]