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The NIBCO I175400 is a 4-inch drain, waste, and vent (DWV) end cap manufactured from acrylonitrile butadiene styrene (ABS). It is designed to terminate open pipe runs in DWV piping systems, preventing debris ingress and maintaining system integrity during rough-in, pressure testing, or permanent closure. The hub connection type accepts standard 4-inch pipe into a solvent-weld socket. Rated for a working temperature range of -40 degrees F to 180 degrees F, this fitting suits a wide range of residential and light commercial DWV applications. Licensed plumbers and pipefitters are the primary installers. NIBCO manufactures this fitting under ISO 9001:2008 quality standards.
This end cap is used in residential and light commercial drain, waste, and vent piping systems where a 4-inch pipe run must be capped off. Common install scenarios include terminating a future rough-in stub, closing an unused branch during system buildout, or permanently capping a decommissioned line. Its ABS construction makes it well-suited for indoor DWV systems where solvent cement joining is standard practice.
Designed as an OEM-style replacement and new-installation fitting for 4-inch ABS DWV piping systems using hub (solvent-weld socket) connections.
Installation is performed by licensed plumbers in accordance with applicable plumbing codes such as the IPC or UPC. Shut off water supply and ensure the pipe is dry and clean before applying solvent cement. Use ABS-compatible solvent cement and primer per manufacturer instructions and local code requirements. Do not apply solvent cement in enclosed spaces without adequate ventilation.
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