A.Y. McDonald 6133T CTS Compression Coupling, Copper Tube Fitting

A.Y. McDonald 6133T CTS Compression Coupling, Copper Tube Fitting

The A.Y. McDonald 6133T is a CTS (copper tube size) compression coupling designed for rough-in water service work where a plumber or contractor needs a reliable mechanical connection between sections of tubing rated to CTS dimensions. This family is available in 3/4", 1-1/2", and 2" CTS sizes, giving installers a consistent, correctly dimensioned option across the most common water service and distribution tubing runs. Identified by model number 6133T (cross reference 4130-762), each size in this coupling family is sized specifically to the CTS standard, making it a straightforward specification match for jobs that call out copper tube size rather than iron pipe size (IPS) tubing. As a behind-the-wall or underground rough-in component, these couplings are built for the connection itself, not for visible finish work, so installers should confirm the mating tube outside diameter matches CTS before installation.

Key Features

• Trade Size Range: Available in 3/4", 1-1/2", and 2" CTS, matched to copper tube size piping used in water service and distribution runs.
• Compression Connection: Joins tubing sections mechanically without soldering or solvent welding, allowing for straightforward rough-in assembly and future serviceability.
• CTS-Specific Sizing: Dimensioned to copper tube size standards so each coupling seats correctly on tubing produced to CTS outside-diameter tolerances, reducing the risk of a mismatched fit.
• Model Cross Reference: Identified under A.Y. McDonald part number 6133T and cross-reference 4130-762 for accurate ordering and replacement matching across all sizes.
• Rough-In Application: Intended for installation behind walls or below grade as part of a water service or distribution line, not as an exposed decorative fitting.
• Consistent Family Sizing: Selecting the correct size from the 3/4" to 2" CTS range lets contractors standardize on one compression coupling design across multiple tube diameters on the same job.

Technical Specifications

• Model: 6133T
• Cross Reference: 4130-762
• Size Options: 3/4", 1-1/2", 2" CTS
• Connection Type: Compression

Typical Applications

• Water Service Line Connections
• Residential and Commercial Rough-In Plumbing
• Copper Tube Size (CTS) Distribution Piping
• Underground and Behind-the-Wall Tubing Joints
• Repair and Replacement of Existing CTS Couplings

Why A.Y. McDonald?

A.Y. McDonald is a long-established name in water works and plumbing rough-in supply, and the 6133T CTS compression coupling family reflects that focus on straightforward, correctly sized fittings for water service tubing. Contractors specifying by CTS size and model or cross-reference number can rely on this coupling to match copper tube size dimensions precisely across the 3/4", 1-1/2", and 2" range, helping avoid fit issues during installation. For plumbers standardizing on A.Y. McDonald compression fittings across a job, the 6133T series provides a consistent, correctly dimensioned option for CTS connections regardless of which size the run requires.