Nibco, 74-CL-1/2, Multi-Turn Boiler Drain, 1/2 in, MIP x Hose

1/2" Cast Copper Boiler Drain Valve – Built for Performance and Longevity

The 1/2" Cast Copper Boiler Drain Valve is engineered for reliability in low-pressure hydronic and potable water systems. With durable copper alloy construction, this valve provides long-lasting performance in residential and light commercial applications where consistent drainage access is essential.

Designed for Efficient System Maintenance

This multi-turn valve is ideal for draining boiler tanks, water heaters, and supply lines. Its male pipe thread connection allows for secure installation into compatible fittings, while the hose thread outlet provides a convenient connection point for drainage or flushing hoses. The corrosion-resistant body ensures longevity, even under frequent use.

Key Features

• High-Strength Cast Copper Alloy – Built to withstand wear, corrosion, and system pressure up to 125 PSI.
• Multi-Turn Handle – Offers precise flow control for drainage operations and system servicing.
• Standard Hose Thread Outlet – Easily connects to garden hoses for controlled discharge.
• Male Inlet Threads – Compatible with standard pipe fittings for fast installation into supply lines or tanks.
• Dezincification-Resistant Composition – Enhances resistance in aggressive water conditions.
• Screw-In Bonnet Design – Allows for service access and secure sealing.

Technical Specifications

• Size: 1/2 inch nominal
• Inlet Connection: 1/2" MIP (male iron pipe)
• Outlet Connection: 3/4" hose thread
• Pressure Rating: 125 PSI
• Temperature Rating: Up to 180°F
• Body Material: Cast copper alloy
• Warranty: 2-year limited manufacturer warranty

Installation Considerations

This valve should be installed by qualified personnel to ensure leak-free performance and compliance with local codes. Pipe dope or thread sealant should be applied appropriately on male threads. Be sure to orient the hose connection for accessible draining or flushing procedures. Valve should not be used in high-pressure applications exceeding its rated capacity.

Trusted on the Job Site

Whether integrated into boiler drain assemblies or used as a dedicated flush valve, this cast copper drain valve is trusted for its consistent operation and rugged construction. It's a go-to solution for contractors seeking quality hardware that performs under pressure and resists corrosion in demanding hydronic environments.