The Polypipe Soil Solvent boss adaptor is made out of Polyvinyl Chloride (PVC- U) which makes it ideal to carry liquids in a continuous flow. The adaptor has been designed for secure jointing with solvent cement. This equipment has a perfect grip seal which helps connect soil and waste pipes together. The incorporated captive seal technology makes it leak resistant. Black Boss Adaptor manufactured by Polypipe Building Products as part of the Soil Systems range - PolySoil® Features & Benefits: Polypipe's soil and vent systems combine to provide one of the most comprehensive ranges available for the residential sector. Provides everything needed for quick, easy installation and trouble-free performance; including push fit ring seal and solvent weld options, air admittance valves, fire protection sleeves, pan connectors, fixings and ancillaries. Aids the flow of waste and foul smells out of the household or building into the sewerage.