Sigma 819900739 Fig 3124 Pipe Cap 2 Inch Fnpt 150 Lb

Product Description

The SIGMA 819900739 is a FIG 3124 malleable iron pipe cap with a 2-inch nominal size and a female NPT (FNPT) end connection. It is rated for 150 lb service and carries a galvanized finish for corrosion resistance in wet or exposed environments. Pipe caps are used to terminate open pipe ends in a threaded piping system, preventing flow, blocking contamination, or capping inactive branch lines. This fitting is suited for plumbing, mechanical, and industrial piping systems where threaded malleable iron fittings are specified.

This pipe cap is appropriate for residential and commercial plumbing and mechanical piping systems operating at 150 lb pressure ratings. It threads onto a 2-inch male NPT pipe end and is commonly installed during rough-in, system testing, or when permanently closing off a branch. Plumbers and pipefitters install this type of fitting in water supply, gas distribution, and general mechanical systems where galvanized malleable iron is an accepted material.

Key Features

• 2-inch nominal FNPT connection threads directly onto standard 2-inch male NPT pipe
• 150 lb pressure rating suitable for standard threaded piping service
• Malleable iron construction provides strength and resistance to impact and vibration
• Galvanized finish protects against corrosion in damp or exposed installations
• FIG 3124 designation for straightforward replacement and specification matching

Compatibility

Designed as an OEM-style replacement fitting for standard 2-inch FNPT threaded malleable iron piping systems rated at 150 lb.

Installation Notes

Installation is performed by a licensed plumber or pipefitter in accordance with applicable codes such as the IPC or IFGC. Shut off system pressure and drain the line before threading on the cap. Apply appropriate thread sealant or PTFE tape to the male pipe threads before installation. Do not overtighten, as malleable iron fittings can crack under excessive torque.

Technical Specifications

• Nominal Size: 2 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: 819900739