The Spears P429 series DWV reducing double sanitary tee is made of PVC, has hub connections on all ends, and is suitable for waste water systems in residential applications. This double sanitary tee is cross shaped and has four ends to connect and branch four pipes, two on the main run and two to connect to two separate smaller diameter pipes. Internal construction of the branches moves the flow at a gradual angle to prevent clogging. The hub connections slide over the end of male unthreaded pipes with a smooth bore for enhanced flow. This fitting is made of PVC (polyvinyl chloride) for use in non-pressure residential drain, waste, vent (DWV) sanitary systems. PVC resists corrosion and chemicals, exhibits high strength, and weighs less than fittings made from metal. PVC can be connected to other materials such as steel, copper, or cast iron using transition fittings. The fitting has an operating temperature range of 73 to 140 degrees F (23 to 60 C). This DWV double sanitary tee complies with American Society for Testing and Materials International (ASTM) D2665 and ASTM D3311 for quality assurance, is National Sanitation Foundation International (NSF)/American National Standards Institute (ANSI) Standard 14 certified to the Uniform Plumbing Code (NSF – U.P. Code) and NSF-dwv for quality assurance, and conforms with lead content requirements for "lead free" plumbing as defined by California and Vermont. It is suitable for waste water systems in residential applications.

Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. When purchasing pipe fittings, consider the application, as this will affect material type, shape, size, and required durability. Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness).

Spears Manufacturing produces thermoplastic fittings and valves for fluid, drain, waste, and vent systems. The company, founded in 1969 and headquartered in Sylmar, CA, meets International Organization for Standardization (ISO) standard 9001.