PVC DWV couplings are used to join matching PVC DWV pipe, with plain, repair slip and threaded types available for different installation and access requirements.
Plain couplings join two sections of pipe using female sockets with an internal centre stop. Each pipe slides into the coupling until it reaches the stop, positioning the coupling between the two pipe ends.
Repair slip couplings have no internal stop, allowing the coupling to slide fully along the pipe. This makes them useful for repairs or installations where the pipe cannot be moved far enough to fit a standard coupling.
Threaded couplings have an internal centre stop and can be used like a plain coupling to join two matching pipes. They also have an external male thread that accepts a matching threaded access cap, allowing the fitting to provide removable access when configured for that purpose.
The socket connections fit over matching PVC DWV pipe and are joined using PVC priming fluid and suitable non-pressure PVC solvent cement. This is known as a solvent weld joint, or SWJ.
PVC DWV pipe and fittings are suitable for use in stormwater, sewerage, wastewater, vent, and other non-pressure applications.
