Philmac CTS-OD Compression Female Tee | ASTM D2737

The Philmac CTS-OD Compression Female Tee provides a secure and dependable way to create a female-threaded branch connection in CTS-OD polyethylene water pipe. Designed for Copper Tube Size Outside Diameter (CTS-OD) polyethylene pipe manufactured to ASTM D2737, this fitting allows HDPE water lines to connect directly to compatible male-threaded valves, fittings, and water distribution equipment.

Featuring compression connections on both straight-through ends and a female-threaded branch connection, this three-way tee allows water to continue through the main polyethylene supply line while providing an additional threaded outlet for connecting livestock watering equipment or other plumbing components.

Ideal for livestock watering systems, rotational and regenerative grazing setups, agricultural irrigation, and farm water distribution, Philmac CTS-OD female tees provide a practical solution for expanding water systems and adding threaded connections without requiring multiple fittings.

Whether you're installing a new livestock watering system, adding a branch connection for a water tank, or modifying an existing HDPE water line, this compression female tee provides a convenient way to connect polyethylene pipe to threaded plumbing components.

Key Features

• CTS-OD Compatibility: Designed for polyethylene pipe manufactured to ASTM D2737.
• Three-Way Tee Design: Creates an additional threaded branch connection along a polyethylene water line.
• Compression x Female Thread Connection: Features two CTS-OD compression connections and one female-threaded branch.
• Female Pipe Thread Outlet: Connects to compatible male-threaded valves, fittings, and water distribution equipment.
• Reducing Branch Options: Select sizes feature a smaller threaded branch than the main compression connections.
• No Heat Fusion Required: Compression connections install without specialized welding or fusion equipment.
• Durable Construction: Designed for agricultural and water distribution applications.
• Versatile Applications: Suitable for livestock watering, irrigation, and compatible cold-water distribution systems.
• Multiple Sizes Available: Accommodates a variety of CTS-OD polyethylene pipe and threaded branch sizes.

Common Applications

• Livestock watering systems
• Rotational and regenerative grazing water systems
• Agricultural water distribution
• Creating female-threaded branches in HDPE water lines
• Connecting male-threaded valves to polyethylene pipe
• Supplying water to livestock tanks and watering stations
• Water supply manifolds and distribution systems
• Farm and ranch plumbing installations
• Irrigation water supply connections
• Expanding existing polyethylene water systems

Available Sizes

Sizes are listed as CTS-OD compression pipe size x female-threaded branch size. Both straight-through compression connections are the same nominal size.

• 3/4" x 3/4" – SKU 01638
• 1" x 3/4" – SKU 01639
• 1" x 1" – SKU 01640
• 1 1/4" x 1" – SKU 01641
• 1 1/4" x 1 1/4" – SKU 01642
• 1 1/2" x 1 1/4" – SKU 01643
• 1 1/2" x 1 1/2" – SKU 01644
• 2" x 2" – SKU 01645

What Is a CTS-OD Compression Female Tee Used For?

A compression female tee allows a polyethylene water line to continue through the main supply line while creating an additional female-threaded connection for a branch line, valve, or other plumbing component.

For example, a livestock watering system may use a main HDPE water line running through several paddocks. A Philmac CTS-OD Compression Female Tee can be installed along that line to provide a threaded outlet for connecting a compatible male-threaded valve or fitting leading to a livestock water tank.

This makes it easier to add watering locations without installing an entirely separate water supply line from the original source.

These fittings are especially useful in rotational grazing systems where multiple paddocks require dependable access to water.

Reducing female tees allow a larger CTS-OD polyethylene main line to connect to a smaller threaded branch, providing flexibility when designing water distribution systems.

Important: When adding multiple branch connections, consider pipe diameter, available pressure, elevation changes, and total livestock water demand. Proper pipe sizing helps maintain adequate flow throughout the system.

Important Compatibility Information

This female tee is designed for CTS-OD polyethylene pipe (ASTM D2737).

CTS-OD pipe has different outside diameter dimensions than IPS-OD (ASTM D3035) and IPS-ID (SIDR ASTM D2239) polyethylene pipe.

Always verify your pipe's outside diameter and sizing standard before purchasing compression fittings.

The two straight-through connections are designed for compatible CTS-OD polyethylene pipe, while the female-threaded branch connects to a compatible male-threaded plumbing fitting.

Verify the threaded connection size and thread standard before installation. Use an appropriate thread sealant approved for the fitting material and application, following the manufacturer's installation recommendations.

For proper installation, ensure pipe ends are cut square, properly prepared, and inserted to the manufacturer's recommended depth. Follow Philmac's instructions for tightening and pressure testing