Mueller Industries h-15409 3/4 Inch Cts X Ips Union Fitting

Product Description

The MUELLER INDUSTRIES h-15409 is a straight three-part union fitting designed for conductive compression connections between CTS (Copper Tube Size) and IPS (Iron Pipe Size) tubing. It ships as a complete three-part assembly, meaning the union body, nut, and ring are included and ready for installation without additional compression hardware. The lead-free construction meets current potable water standards, making this fitting appropriate for domestic water supply lines. Licensed plumbers and pipefitters install this type of union when a removable, serviceable connection is needed between dissimilar tubing standards.

This fitting is suited for residential and light commercial plumbing systems where CTS tubing transitions to IPS-threaded or IPS-dimensioned pipe. The conductive compression design maintains electrical continuity across the joint, which is important in systems that rely on pipe bonding for grounding or cathodic protection. The three-part union configuration allows the connection to be broken and remade without cutting or replacing the fitting, reducing labor time during repairs or system modifications.

Key Features

• 3/4 inch straight union connects CTS tubing to IPS tubing in a single fitting
• Three-part union body allows the joint to be disassembled and reassembled without replacing the fitting
• Conductive compression design maintains electrical continuity across the connection
• Lead-free construction meets potable water compliance requirements
• Mueller 110 compression series — no soldering or open flame required for installation

Compatibility

Designed for use with 3/4 inch CTS and IPS tubing in compression-type plumbing assemblies. Consult the Mueller 110 series documentation for full tubing material and dimensional tolerances.

Installation Notes

This fitting is installed by licensed plumbers working under applicable plumbing codes such as the IPC or UPC. Shut off and depressurize the supply line and drain standing water before disassembling or making new connections. Compression fittings do not require solder or flux, but ensure tubing ends are cut square and deburred before seating the compression ring. Do not overtighten the union nut, as excessive force can deform the compression ring and cause leaks.

Technical Specifications

• Size: 3/4 inch
• Connection Type: Compression (CTS x IPS)
• Configuration: Straight Three-Part Union
• Series: Mueller 110 Conductive Compression
• Lead Free: Yes

Standard Information

• Brand: MUELLER INDUSTRIES
• Manufacturer Part Number: h-15409