Sigma 819907445 Hex Head Pipe Bushing 1.5x1 in 150lb Galvanized

Product Description

The SIGMA 819907445 is a standard hex head pipe bushing conforming to FIG 3383, designed to reduce a 1-1/2 inch female NPT fitting down to a 1 inch male NPT connection. Constructed from malleable iron with a galvanized finish, this bushing is rated for 150 lb service pressure. The hex head profile allows wrench engagement for reliable torque during installation. Plumbers and pipefitters install this fitting in threaded pipe assemblies wherever a concentric size reduction is needed at a junction point in the line.

This bushing is suited for residential and commercial plumbing, fire protection, and general industrial piping systems that use standard 150 lb threaded malleable iron fittings. The male NPT by female NPT end configuration makes it a direct-thread reducer, threading into a larger female fitting while accepting a smaller male pipe or fitting on the opposite end. It is commonly installed in water supply lines, low-pressure steam systems, air lines, and similar threaded pipe networks where galvanized iron components are specified.

Key Features

• 1-1/2 inch FNPT inlet reducing to 1 inch MNPT outlet for concentric pipe size reduction
• Malleable iron construction provides toughness and resistance to mechanical shock
• Galvanized finish adds corrosion resistance for water and outdoor service environments
• 150 lb pressure rating compatible with standard threaded pipe system fittings
• Hex head design allows secure wrench engagement during makeup and removal
• FIG 3383 standard profile ensures dimensional interchangeability with comparable fittings

Compatibility

Designed as an OEM-style replacement and standard fitting for 150 lb malleable iron threaded pipe systems using NPT connections.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable plumbing codes such as the IPC. Shut off and depressurize the pipe system completely before removing or installing any threaded fittings. Apply thread sealant or PTFE tape to the male threads before makeup, and tighten to a snug fit using a pipe wrench on the hex head — avoid overtightening, which can crack malleable iron fittings. Inspect threads for damage before installation.

Technical Specifications

• Nominal Size: 1-1/2 x 1 inches
• End Style: MNPT x FNPT
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Galvanized
• Figure Number: FIG 3383

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 819907445