Sigma 811016419 Malleable Iron Street Elbow 3/4 in 150 Lb

Product Description

The SIGMA 811016419 is a galvanized malleable iron street elbow rated for 150 lb service. It connects a male NPT thread directly to a female NPT thread, allowing a direction change within a threaded pipe assembly without requiring a separate coupling or nipple. The 3/4 inch nominal size suits a wide range of residential and light commercial piping work. Licensed plumbers and pipefitters install this fitting in gas, water, and general-purpose pipe systems where a compact, threaded 90-degree turn is needed. Malleable iron construction provides ductility and impact resistance, and the galvanized finish adds corrosion protection for longevity in wet or outdoor environments.

This street elbow is used in threaded pipe systems across residential and commercial plumbing, HVAC hydronic piping, fire protection, and general industrial applications. The MNPT x FNPT configuration is a standard arrangement for street elbows, letting the fitting thread directly into an existing female-threaded fitting or valve port on one end while accepting a male-threaded pipe or fitting on the other. It is a common component in close-coupled piping runs where space is limited and a back-to-back fitting arrangement is required.

Key Features

• 3/4 inch nominal size with MNPT x FNPT end connections for compact directional changes
• 150 lb pressure rating suitable for general-purpose threaded pipe service
• Malleable iron body offers ductility and resistance to mechanical impact
• Galvanized finish provides corrosion resistance in wet or outdoor installations
• Street elbow design eliminates the need for an additional nipple between fittings

Compatibility

Designed as an OEM-style replacement or standard-service fitting for 3/4 inch nominal threaded pipe systems using 150 lb malleable iron fittings per standard pipe fitting conventions.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, including the IPC and IFGC where relevant. Shut off and depressurize the pipe system completely before disassembling or adding fittings. Apply an approved pipe thread sealant or PTFE tape to male threads before assembly. Do not over-tighten threaded connections, as malleable iron fittings can crack if excessive torque is applied.

Technical Specifications

• Nominal Size: 3/4 inch
• End Style: MNPT x FNPT
• Pressure Rating: 150 lb
• Material: Malleable Iron
• Finish: Galvanized

Standard Information

• Brand: SIGMA
• Manufacturer Part Number: 811016419