Sioux Chief 558-M23 Cts Pipe Eye Insulator Twin Grommet

Product Description

The SIOUX CHIEF 558-M23 is a twin grommet pipe eye insulator designed to support and isolate CTS (copper tube size) pipe runs ranging from 1/2 inch to 3/4 inch outside diameter. The dual-grommet construction cushions the pipe against vibration and prevents direct metal-to-metal contact between the pipe and structural framing. It is used wherever a pipe must pass through or hang from a wall, floor joist, or framing member in residential and light commercial plumbing installations. Licensed plumbers and mechanical contractors install this fitting as part of a code-compliant pipe support strategy.

This insulator is suited for water supply lines, hydronic distribution piping, and other CTS pipe applications where noise isolation and movement control are required. It accommodates both 1/2 inch and 3/4 inch CTS pipe, making it a versatile single-stock item for service vans and supply rooms. The twin grommet design is particularly useful in copper pipe installations where thermal expansion and pipe movement must be absorbed without abrasion or stress concentrations at the support point.

Key Features

• Twin grommet construction isolates pipe from framing to reduce vibration transmission and noise
• Fits both 1/2 inch and 3/4 inch CTS pipe, covering two common supply line sizes in one part
• Replaces legacy parts 558-M2 and 558-M3, consolidating two SKUs into one
• Designed for through-framing and hanging support applications in plumbing rough-in work
• Prevents direct contact between copper pipe and structural members, reducing corrosion risk at contact points

Compatibility

Designed as a direct replacement for SIOUX CHIEF 558-M2 and 558-M3 insulators. Fits 1/2 inch and 3/4 inch CTS pipe as an OEM-style support component in residential and light commercial plumbing systems.

Installation Notes

Installation is performed by a licensed plumber during rough-in or retrofit pipe support work. Shut off the water supply and depressurize the line before repositioning any existing pipe supports. Verify that the insulator grommet fully seats around the pipe and that the eye bracket is fastened securely to the framing member per local IPC requirements. Do not over-compress the grommet during fastening, as this can reduce its vibration-damping effectiveness.

Technical Specifications

• Pipe Size Range: 1/2 inch to 3/4 inch CTS
• Grommet Type: Twin grommet
• UPC: 739236201607

Standard Information

• Brand: SIOUX CHIEF
• Manufacturer Part Number: 558-M23