Nibco CC05700 Flush Reducer Bushing 4x3 in Poly Sch 80

Product Description

The NIBCO CC05700 is a flush reducer bushing designed to transition between a 4-inch male iron pipe thread (MIPT) and a 3-inch female iron pipe thread (FIPT) connection within the same fitting body. Manufactured from black polypropylene to Schedule 80 wall thickness, this bushing delivers the pressure rating and chemical resistance required in industrial and commercial piping systems. The flush-style design keeps the fitting seated inside the female end, minimizing turbulence at the transition point. It is typically installed by licensed plumbers and pipefitters working on chemical drainage, process piping, or corrosion-resistant DWV applications where metal fittings are not suitable.

This bushing is suited for Schedule 80 polypropylene piping systems in residential, commercial, and light industrial settings. Common applications include chemical waste drain lines, laboratory plumbing, irrigation manifolds, and industrial fluid handling where resistance to acids, bases, and solvents is required. The MIPT x FIPT end configuration allows it to thread directly into standard Schedule 80 plastic or compatible metal threaded fittings without adapters.

Key Features

• Schedule 80 polypropylene construction for elevated pressure and chemical resistance
• Flush reducer design minimizes flow restriction at the size transition
• 4-inch MIPT x 3-inch FIPT end connections for direct threaded installation
• Black polypropylene color provides UV and chemical stability
• Lightweight at 0.49 pounds, reducing load on threaded connections

Compatibility

Designed as an OEM-style replacement fitting for Schedule 80 polypropylene threaded piping systems using standard NPT thread forms.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and ASTM standards for thermoplastic piping. Shut off and depressurize the system completely before removing or installing any threaded fittings. Use PTFE thread tape or a thread sealant rated for polypropylene and the specific fluid service — do not use petroleum-based pipe dope, which can degrade polypropylene. Hand-tighten first, then advance with a strap wrench; avoid metal pipe wrenches that can crack or deform the fitting body.