Copper 3-Way Shut-Off Valve 1/4" 3/8" RO Water Adapter

Copper Three-Way Shut-Off Valve for Reverse Osmosis & Water Supply Lines

Upgrade your home plumbing with this precision-crafted copper three-way shut-off valve, designed for seamless integration with reverse osmosis (RO) systems, hot and cold water supply lines, and general household plumbing. Compatible with both 1/4" and 3/8" threaded connections, this versatile adapter makes it easy to control water flow with confidence and reliability.

Why Choose This Copper Shut-Off Valve?

• Premium Copper Construction: Solid copper body offers exceptional durability, corrosion resistance, and long-lasting performance in both hot and cold water applications.
• Three-Way Design: Allows flexible water routing — control, divert, or shut off flow between multiple lines without additional fittings or adapters.
• Universal Fit: Threaded male connections in 1/4" and 3/8" sizes make this valve compatible with most standard RO systems, faucets, and water supply lines.
• Rated Up to 850 kPa: Built to handle typical household water pressures safely and reliably.
• Easy Installation: Straightforward threaded connection — no specialist tools required. Perfect for DIY plumbing upgrades and replacements.
• Versatile Application: Ideal for reverse osmosis water filtration systems, kitchen faucets, bathroom fixtures, refrigerator water lines, and more.

Product Specifications

• Material: Copper
• Connection Type: Threaded (Male)
• Compatible Sizes: 1/4" and 3/8"
• Max Pressure: <850 kPa
• Application: Hot & Cold Water, Reverse Osmosis Systems, Household Plumbing
• High-Concern Chemicals: None

Perfect For

• Reverse osmosis (RO) water filtration system installations
• Kitchen and bathroom faucet water supply connections
• Refrigerator and ice maker water line hookups
• General household plumbing maintenance and upgrades

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Authoritative Resource

For guidance on safe drinking water systems and plumbing standards, visit the U.S. Environmental Protection Agency (EPA) – WaterSense.

Frequently Asked Questions

Q: What sizes does this copper three-way shut-off valve fit?

A: This valve is compatible with both 1/4" and 3/8" threaded (male) connections, making it suitable for most standard reverse osmosis systems, household faucets, and water supply lines.

Q: Can this shut-off valve be used with both hot and cold water lines?

A: Yes, the solid copper construction makes this valve suitable for use with both hot and cold water supply lines, up to a maximum pressure of 850 kPa.

Q: Is this valve easy to install without a plumber?

A: Absolutely. The standard threaded connection design allows for straightforward DIY installation using basic hand tools. Simply thread it onto your existing water supply line for a secure, leak-resistant fit.

Q: Is this valve safe for use in drinking water or reverse osmosis filtration systems?

A: Yes, the valve contains no high-concern chemicals and is made from solid copper, which is a widely accepted material in household plumbing and water filtration applications.