Keeney 5/8 in. CTS to 3/8 in. Compression Brass Shut-Off Valve with Water Hammer combines precise shut-off control with built-in water hammer suppression for quieter, more reliable piping in residential water lines.
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Durable brass body with chrome-plated finish: Resists corrosion and stands up to daily use while maintaining a clean, polished look in exposed or under-sink installations.
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CTS to compression connection: Inlet is 5/8 in. CTS, outlet is 3/8 in. compression, making it compatible with common copper tubing and faucet supply lines for quick, secure installation.
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Water hammer arrestor integrated: Helps reduce banging and pressure surges when you shut off the supply, protecting pipes and fixtures from repeated stress.
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Quarter-turn shut-off: Smooth, one-hand operation for fast, reliable control—ideal for quick maintenance or fixture replacement.
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Pressure and temperature tolerance: Rated up to 125 psi and 160°F, suitable for typical residential hot and cold-water applications.
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Lead-free for potable water: Built to meet modern safety standards, ensuring clean, safe water in every connection.
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Convenient, versatile use: Perfect for under-sink shut-offs, faucet lines, vanity fixtures, and other everyday water supply tasks where space is at a premium.
Who benefits most? Homeowners upgrading vanity or kitchen faucet lines, DIY enthusiasts replacing aging shut-off valves, and professionals seeking a compact, reliable valve with noise reduction built in. The Keeney valve minimizes installation steps by combining a reliable compression connection with a ready-made water hammer solution, reducing the need for additional accessories and fitting complexity.
Installation and care tips
- Turn off the main water supply before starting.
- For the compression side, ensure the 3/8 in. compression fitting seats fully against the tubing and tightens evenly to prevent leaks.
- On the CTS inlet, ensure a clean, square connection to the copper tube for a secure seal.
- Use appropriate sealant or pipe tape only on threaded connections if required by your installation (the compression side does not require paste).
- After installation, slowly turn the water back on and check for leaks around both ends. If a drip appears, snug the fittings a touch more, then re-check.
Specs at a glance
- Finish: Chrome Plated
- Material: Brass
- Turn Type: Quarter Turn
- End 1 Type/Size: CTS, 5/8 in.
- End 2 Type/Size: Compression, 3/8 in.
- Maximum Pressure: 125 psi
- Maximum Temperature: 160°F
- Lead Content: Lead-Free
- Usage: Water Supply
- Packaging: Clamshell
Invest in a valve that blends dependable mechanics with practical silence. The Keeney 5/8 in. CTS to 3/8 in. compression brass shut-off valve with water hammer is a thoughtful upgrade for quieter, safer, and more efficient home plumbing today.
