This PT Coupling polypropylene reducer nipple fitting has male NPT threads on both ends and is suitable for connecting two pipes with different diameters. The National Pipe Taper (NPT) threads create a ...

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This PT Coupling polypropylene reducer nipple fitting has male NPT threads on both ends and is suitable for connecting two pipes with different diameters. The National Pipe Taper (NPT) threads create a tighter seal than straight threads. This fitting is made of polypropylene for chemical and corrosion resistance, high impact strength and flexibility, and less weight than fittings made from metal. Polypropylene is suitable for food material, potable water, and chemical transfer applications. The fitting has an operating temperature range of -15 to +100 degrees F, a maximum operating pressure rating of 100 pounds per square inch (psi) for pipe sizes below 3", and a 50 psi rating for pipe sizes of 3". This polypropylene reducer nipple fitting is suitable for connecting pipes for liquid transfer applications in the pharmaceutical, chemical, and other industries.

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).

PT Coupling manufactures pneumatic and hydraulic hose fittings for industrial and automotive applications. The company, founded in 1951 and headquartered in Enid, OK, meets International Organization for Standardization (ISO) standard 9001.



  • Reducer nipple for connecting two pipes with different diameters
  • Male NPT threads on both ends for connecting pipes with female NPT threaded ends
  • Polypropylene for chemical and corrosion resistance, high impact strength and flexibility, and less weight than fittings made from metal
  • Maximum operating pressure of 100 or 50 psi
  • Operating temperature range of -15 to +100 degrees
  • Reducer nipple for connecting two pipes with different diameters
  • Male NPT threads on both ends for connecting pipes with female NPT threaded ends
  • Polypropylene for chemical and corrosion resistance, high impact strength and flexibility, and less weight than fittings made from metal
  • Maximum operating pressure of 100 or 50 psi
  • Operating temperature range of -15 to +100 degrees

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