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By certification 
ERA Piping Systems, CPVC Pipe Fitting, Reducing Coupling, CPS004, Schedule 80 (ASTM F439) , NSF-pw & UPC
Scope:
Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness).
Features：
When purchasing pipe fittings, consider the application, as this will affect material type, shape, size and required durability.
FIELDS OF APPLICATION
Piping networks for transferring liquid in metal treating or electroplating plant.
Piping networks for transferring liquid in chemical manufacturing plant.
Specification:
The specification covers Schedule 80 CPVC pipe fittings, intended for use with Iron Pipe Size (IPS) outside-diameter plastic pipe.
Fittings covered by this specification are normally molded. In-line fittings, such as couplings, unions, bushings, caps, nipples, and so forth, shall be molded or machined from extruded stock
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