Sigma 819900648 Malleable Iron Pipe Cap 1-1/4 in Fnpt 150 Lb

Product Description

The SIGMA 819900648 is a FIG 3124 malleable iron pipe cap with a 1-1/4 inch nominal size and female NPT (FNPT) end style. Rated at 150 lb, this galvanized cap is used to close the end of a threaded pipe run in a piping system. The galvanized finish provides corrosion resistance for both indoor and outdoor installations. Licensed plumbers and pipefitters install this type of fitting during new construction, system modifications, or when capping off unused branch lines. Its malleable iron construction offers impact resistance and the ability to withstand system pressure without cracking under normal service conditions.

This pipe cap suits residential and commercial piping applications where a threaded, pressure-rated end closure is required. It is commonly used in water supply, gas distribution, and general-purpose piping systems that call for 150 lb malleable iron fittings. The FNPT thread pattern accepts a standard male NPT threaded pipe end, making it compatible with standard iron pipe installations across a wide range of trade applications.

Key Features

• 1-1/4 inch nominal size for standard iron pipe compatibility
• FNPT thread pattern for direct connection to male NPT pipe ends
• 150 lb pressure class malleable iron construction
• Galvanized finish for corrosion resistance in wet or outdoor environments
• FIG 3124 designation for straightforward replacement sourcing

Compatibility

Designed as an OEM-style replacement fitting for 150 lb malleable iron threaded piping systems using 1-1/4 inch nominal pipe with male NPT threads.

Installation Notes

This fitting is installed by licensed plumbers or pipefitters in accordance with applicable local plumbing and mechanical codes. Shut off and depressurize the piping system completely before threading on or removing any fittings. Apply an appropriate thread sealant or PTFE tape to the male pipe threads before installation. Do not over-tighten, as malleable iron threads can crack if excessive torque is applied.

Technical Specifications

• Nominal Size: 1-1/4 inches
• End Style: FNPT (Female National Pipe Thread)
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Galvanized
• Figure Number: FIG 3124

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 819900648