Sigma 819902446 Square Head Plug 1 in Malleable Iron

Product Description

The SIGMA 819902446 is a cored square head plug designed for use in threaded pipe systems where a removable, pressure-rated closure is needed. Manufactured from malleable iron with a galvanized finish, this plug provides corrosion resistance suitable for water, air, and general plumbing service. The cored design allows the plug to be drilled out or used as a cleanout access point when needed. With a 1 inch nominal thread size, it installs into standard NPT female fittings using a square drive or pipe wrench. Licensed plumbers and pipefitters use this fitting in a wide range of commercial and residential applications.

This square head plug is suited for use in water supply, compressed air, and general-purpose piping systems. The galvanized malleable iron construction holds up well in damp or moderately corrosive environments. It is commonly installed at dead-end branch lines, cleanout ports, or any location requiring a threaded pipe termination. The 1 inch nominal size fits standard pipe configurations found in both new construction and retrofit work.

Key Features

• Cored square head design allows use as a cleanout access point or drilled-out port
• Malleable iron construction provides strength and resistance to impact
• Galvanized finish adds corrosion protection for wet or damp service environments
• 1 inch nominal NPT thread fits standard female threaded pipe fittings
• Square head drive accepts a pipe wrench or socket tool for secure installation and removal

Compatibility

Designed as an OEM-style replacement or standard-stock fitting for 1 inch NPT threaded pipe systems in plumbing, HVAC, and industrial piping applications.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable IPC and local plumbing code requirements. Shut off and depressurize the piping system completely before installing or removing any threaded plug. Apply an approved thread sealant or PTFE tape to the male threads before installation to ensure a leak-free seal. Do not overtighten malleable iron fittings, as the material can crack under excessive torque.

Technical Specifications

• Nominal Size: 1 inch
• Material: Malleable Iron
• Finish: Galvanized
• Head Style: Square Head (Cored)
• Thread Type: NPT

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 819902446