Description

This Standard covers mechanical couplings that are used to axially join pipes and fittings in non-pressure drain, waste, and vent (DWV) piping systems and sewer piping systems located inside or outside buildings and above ground or underground. 

Scope

This Standard specifies requirements for mechanical couplings of the following types: 

• Type 1: couplings that are used to join pipes of the same or different materials or sizes and that incorporate a centre stop and an external shield. 
• Type 2: couplings that are used to join pipes of the same or different materials or sizes, but for which a centre stop and/or shear ring are allowed but not required. 
• Type 3: couplings used to join hubless cast iron pipe and fittings. Such couplings are composed of a stainless steel shield, a clamp assembly, and an elastomeric sealing component that complies with ASTM C564. 
• Type 4: elastomeric bellows expansion joint couplings used to join pipe of the same or different materials or sizes incorporating pipe stops. 

This Standard does not cover the joining of pipes and fittings with bell and spigot ends that use an elastomeric gasket seal.