Sigma 818907008 Hex Head Pipe Bushing 1-1/4x1 in 150 Lb

Product Description

The SIGMA 818907008 is a standard hex head pipe bushing designed to reduce pipe thread sizes in threaded piping systems. It features a male NPT (MNPT) outer thread and a female NPT (FNPT) inner thread, allowing a 1-1/4 inch pipe connection to step down to a 1 inch pipe connection. Rated at 150 lb, this bushing is constructed from malleable iron with a black oxide finish, providing solid corrosion resistance and durability in typical plumbing and mechanical piping applications. Plumbers and pipefitters install this fitting as part of threaded iron pipe assemblies.

This hex head bushing is suited for residential and light commercial plumbing, hydronic heating, gas distribution, and general mechanical piping systems where a threaded size reduction is required. The hex head design allows for wrench engagement during installation, making it easy to tighten securely into a fitting or valve body. It conforms to standard 150 lb malleable iron fitting dimensions used across the trade.

Key Features

• Reduces from 1-1/4 inch MNPT to 1 inch FNPT in a single fitting
• 150 lb pressure class malleable iron construction
• Black oxide finish for corrosion resistance in standard service conditions
• Hex head design allows wrench tightening for a secure, leak-free connection
• Standard NPT threads compatible with common pipe fittings and valves

Compatibility

Designed as an OEM-style replacement or standard trade fitting for 150 lb malleable iron threaded pipe systems requiring a 1-1/4 inch to 1 inch bushing reduction.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable IPC or IFGC codes for threaded pipe assemblies. Shut off and depressurize the system before installing or replacing any threaded fitting. Apply an appropriate thread sealant or PTFE tape to the male threads before assembly. Do not over-tighten, as malleable iron fittings can crack if excessive torque is applied.

Technical Specifications

• Nominal Size: 1-1/4 x 1 inches
• End Style: MNPT x FNPT
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Black Oxide
• Figure: FIG 3383

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 818907008