Sigma 819902487 Cored Square Head Plug 1-1/4 in Galvanized

Product Description

The SIGMA 819902487 is a cored square head plug rated for 1-1/4 inch nominal pipe connections. Made from malleable iron with a galvanized finish, this plug is used to seal or temporarily close pipe ends in threaded piping systems. The square head drive allows installation and removal with a standard wrench. The cored design means the plug is cast with a hollow center to reduce material weight while maintaining thread integrity. Plumbers and pipefitters install this fitting in commercial and residential applications wherever a durable, corrosion-resistant pipe closure is required.

This plug is suited for use in threaded malleable iron or steel piping systems found in plumbing, HVAC hydronic, and general mechanical systems. The galvanized coating provides corrosion resistance in wet or damp service environments. Typical applications include capping unused branch outlets, test ports, and service connections in both new construction and retrofit work.

Key Features

• 1-1/4 inch nominal size fits standard NPT threaded pipe and fittings
• Malleable iron construction provides strength and impact resistance
• Galvanized finish resists corrosion in wet or exposed installations
• Square head drive accepts standard wrenches for secure installation and removal
• Cored design reduces weight while maintaining full thread engagement

Compatibility

Designed as an OEM-style replacement fitting for 1-1/4 inch nominal threaded malleable iron piping systems in plumbing and mechanical applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and ASME B16.3 standards for malleable iron fittings. Shut off and depressurize the piping system before installing or removing any threaded plug. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Do not overtighten — use a wrench on the square head and tighten to snug plus a firm turn to avoid cracking the fitting.

Technical Specifications

• Nominal Size: 1-1/4 inches
• Material: Malleable Iron
• Finish: Galvanized
• Head Style: Square Head Cored
• Origin: Import

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 819902487