The B&K Proline 1 in. CTS to 1 in. CTS Brass Coupling is a purpose-built solution for joining 1" copper tube size (CTS) piping with confidence. Crafted from lead-free brass, this coupling delivers a durable, safe connection for potable water systems while staying compact enough for tight spaces and retrofit projects.
Why this CTS brass coupling stands out
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Lead-free brass construction provides safer, cleaner water connections for residential and commercial Plumbing projects.
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Two 1" CTS ends designed to connect 1" CTS copper tubes, enabling straightforward, dependable installations in standard copper piping runs.
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Solid pressure and temperature tolerance rated up to 125 psi and 210°F, making it suitable for typical domestic water lines and many heating applications.
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Trusted Proline quality from B&K, offering consistent performance and compatibility with other CTS fittings in your system.
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Non-ANSI certified — check local codes and project requirements to ensure this coupling meets your installation standards.
Where and how you’ll use it
Perfect for repairs, renovations, or new installs that involve 1" CTS copper tubing, this coupling provides a reliable link in potable water supply lines, small appliance connections, or baseboard heating loops where CTS sizing is the standard. Its brass body resists corrosion in typical water environments, helping to minimize leaks over time.
Practical guidance for use
For best results, ensure both CTS ends are clean and free of burrs before installation. Use compatible CTS fittings and follow local plumbing codes for connection method and tightening recommendations. While this coupling is designed for everyday water service, verify that its 125 psi and 210°F ratings align with your specific application and fluid conditions.
Specifications at a glance
- 1 in
- 1 in
- CTS
- CTS
- Brass (lead-free)
- 125 psi
- 210°F
- B&K Proline
- Coupling
- No
