Asc Engineered Solutions 3.NMCAP Pipe Cap 3in Fnpt 150lb

Product Description

The ASC Engineered Solutions 3.NMCAP is a 3-inch straight pipe cap with a female NPT (FNPT) threaded end, rated at 150 lb. Constructed from malleable iron with a galvanized finish, this cap is built to seal the end of a threaded pipe run in gas, water, and general plumbing distribution systems. The galvanized coating provides corrosion resistance for both indoor and outdoor installations. Domestically manufactured, it meets the dimensional and pressure standards expected of 150 lb Class malleable iron fittings. Plumbers and pipefitters rely on this type of cap when capping unused branch outlets or temporarily isolating sections of a piping system.

This pipe cap is suited for residential and light commercial plumbing, gas distribution, and mechanical piping applications where a 3-inch FNPT termination is required. It threads directly onto a male NPT pipe end, providing a secure, leak-resistant closure. Typical install scenarios include capping stub-outs during rough-in, sealing unused tee branches, and isolating sections for pressure testing. Its 150 lb pressure class makes it appropriate for standard-pressure water, air, and gas service lines.

Key Features

• 3-inch FNPT threaded connection for standard male NPT pipe ends
• 150 lb pressure class rating suitable for standard water, air, and gas service
• Malleable iron construction provides strength and impact resistance
• Galvanized finish resists corrosion in wet and outdoor environments
• Domestically manufactured to standard malleable iron fitting dimensions

Compatibility

Designed as an OEM-style replacement and standard-use fitting for 3-inch male NPT threaded pipe ends in 150 lb Class malleable iron piping systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable IPC and IFGC codes. Shut off and depressurize the affected piping system before installing or removing any threaded fitting. Apply thread sealant or PTFE tape to the male NPT threads before threading on the cap; do not apply sealant to FNPT threads. Hand-tighten first, then use a pipe wrench to achieve a secure, leak-free connection without over-torquing the fitting.

Technical Specifications

• Pipe Size: 3 inches
• Connection Type: FNPT (Female National Pipe Thread)
• Pressure Class: 150 lb
• Material: Malleable Iron
• Finish: Galvanized
• Origin: Domestic

Standard Information

• Brand: ASC Engineered Solutions
• Manufacturer Part Number: 3.NMCAP