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CTS Flange: Complete Guide to Copper Tube Size Flanges in the USA
What is a CTS Flange?
A CTS flange, or Copper Tube Size flange, is a mechanical component designed to connect copper piping systems with valves, pumps, or other pipeline sections. Commonly used in plumbing, HVAC, and hydronic systems, CTS flanges help create secure, leak-proof joints with easy disassembly and inspection access.
In the USA, CTS flanges are widely used due to the popularity of copper piping in both residential and commercial systems.
Why Choose CTS Flange in the USA?
CTS flange USA products are engineered to match U.S. piping standards and are trusted for:
- Compatibility with standard copper tubing
- Long-term corrosion resistance
- Durability under pressure and temperature fluctuations
- Simplified installation and maintenance
- Wide size availability, including 1-1/4″, 3″, 4″, 6″, and 8″
CTS Flange Sizes and Their Applications
3 CTS Flange
Used in smaller water lines, radiant heating systems, and residential HVAC loops.
4 CTS Flange
Common in commercial applications such as rooftop units, boilers, and main water feeds.
6 CTS Flange
Suited for mid-to-large commercial buildings, hotels, or hospitals where larger water volumes are moved.
8 CTS Flange
Ideal for industrial and municipal piping systems with high flow requirements.
1-1/4 CTS Flange
Typically used in smaller commercial or high-end residential plumbing and HVAC systems.
Types of CTS Flanges and Accessories
CTS Flange Gasket
Gaskets are essential for sealing the flange joint. Materials like EPDM or rubber are used to ensure leak-free performance in hot or cold water systems.
CTS Flange Copper
Copper-based CTS flanges offer excellent thermal conductivity and resistance to scaling, ideal for hydronic heating and chilled water systems.
CTS Flange Bolt Kit
A bolt kit includes bolts, nuts, and washers necessary for securing the flange. Always use high-quality stainless or coated bolts to resist corrosion.
CTS Press Flange
Press-fit CTS flanges eliminate the need for soldering. These are installed using a press tool, making them suitable for clean and fast installations, especially in confined areas or retrofit jobs.
Applications of CTS Flanges in the USA
CTS flanges are used across multiple industries in the United States. These include:
- Residential plumbing systems
- Commercial and industrial HVAC piping
- Chilled water systems
- Hydronic heating systems
- Potable water distribution
- Fire protection piping (where copper is approved)
How to Select the Right CTS Flange
When selecting a CTS flange, consider the following factors:
- Match the flange to your pipe’s outer diameter based on CTS specifications
- Consider the material of the piping—copper, PEX with adapters, or CPVC
- Choose between solder, press-fit, or mechanical bolt-on styles
- Use proper flange gaskets rated for temperature and pressure
- Always pair with a certified CTS flange bolt kit for secure installation
Installation and Maintenance Guidelines
Installation Tips:
- Cut and clean the copper tubing before flange assembly
- Ensure proper alignment before tightening
- Use torque settings recommended by the manufacturer for bolt kits
- For press flanges, use only certified pressing tools
Maintenance Tips:
- Inspect the gasket and flange face during routine system checks
- Retighten bolts if needed due to system vibration or thermal cycling
- Monitor for leaks at joints, especially in high-temperature systems
- Replace gaskets periodically in high-use or high-pressure environments
Where to Buy CTS Flanges in the USA
CTS flanges and accessories are widely available through:
- Plumbing supply stores
- HVAC equipment distributors
- Online marketplaces like Grainger, Ferguson, and Zoro
- Specialty pipe and fitting manufacturers offering bulk and custom orders
When buying, always confirm compatibility with your copper tube size and system requirements.
Conclusion
Whether you’re installing a new water system, upgrading an HVAC loop, or managing a commercial plumbing project, choosing the right CTS flange USA product is key. From 1-1/4 CTS flange to 8 CTS flange, and types like CTS press flange, CTS flange copper, and CTS flange gasket, there’s a flange solution for every application.
Ensure system reliability, simplify maintenance, and meet U.S. piping standards with high-quality CTS flange fittings and accessories.
1. What is a CTS flange?
A CTS flange is a mechanical fitting used to connect copper tube size (CTS) pipes in plumbing, HVAC, and hydronic systems. It provides a secure and leak-proof joint while allowing for easy maintenance and disassembly.
2. What sizes are CTS flanges available in?
CTS flanges are available in multiple sizes including 1-1/4″, 3″, 4″, 6″, and 8″, suitable for residential, commercial, and industrial piping systems.
3. What is a CTS press flange?
A CTS press flange is designed for use with press-fit installation tools, allowing quick, flame-free connections without soldering. It’s ideal for modern installations and retrofit projects.
4. Do I need a gasket with a CTS flange?
Yes, a gasket is typically used between CTS flange connections to ensure a tight, leak-proof seal. Gasket materials vary based on the system’s pressure, temperature, and fluid type.
5. Where are CTS flanges used?
CTS flanges are used in residential plumbing, commercial HVAC systems, hydronic heating, chilled water systems, and potable water lines throughout the USA.
