Dura Plastic L176750P Pvc Pipe Cap 4 Inch Fnpt Sch 40

Product Description

The DURA PLASTIC L176750P is a 4-inch nominal PVC threaded pipe cap rated for Schedule 40 and standard wall applications. The female NPT (FNPT) end style allows it to thread directly onto male-threaded pipe ends, creating a secure, pressure-rated termination point. Manufactured from PVC, this cap is suited for use in water distribution, irrigation, chemical conveyance, and drainage systems where a clean, permanent or serviceable pipe end closure is required. Licensed plumbers and pipefitters are the typical installers, and the domestic manufacture designation indicates U.S.-sourced production.

This cap is appropriate for residential and light commercial plumbing, irrigation mainlines, and industrial process piping where 4-inch Schedule 40 PVC pipe is used. The FNPT thread pattern ensures compatibility with standard NPT-threaded pipe ends without requiring additional adapters. It is a common choice for capping off branch lines, pressure-test points, or unused service outlets in PVC piping systems.

Key Features

• 4-inch nominal FNPT end style threads directly onto male NPT pipe ends
• Rated for Schedule 40 and standard wall pipe systems
• PVC construction provides corrosion resistance in wet and chemical environments
• Domestically manufactured
• Clean termination for branch lines, test ports, or unused outlets

Compatibility

Designed as an OEM-style replacement and standard fitting for 4-inch nominal Schedule 40 PVC piping systems with male NPT-threaded pipe ends.

Installation Notes

Installation is performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC and local plumbing codes. Depressurize and drain the line completely before installing or removing any threaded cap. Apply an appropriate thread sealant or PTFE tape to the male pipe threads before hand-tightening and then finishing with strap or pipe wrenches. Do not over-torque PVC fittings, as excessive force can crack the fitting body or damage the threads.

Technical Specifications

• Nominal Size: 4 inches
• End Style: FNPT (Female National Pipe Thread)
• Schedule: SCH 40 / STD
• Material: PVC
• Origin: Domestic

Standard Information

• Brand: DURA PLASTIC
• Manufacturer Part Number: L176750P