Parker DC606-4 Drain Cock Shutoff Valve 1/4-18 Nptf Brass

Product Description

The PARKER DC606-4 is a brass drain cock shutoff valve designed for fluid system drainage and isolation applications. It features an external seal design with a 1/4-18 NPTF threaded connection and is rated for a maximum working pressure of 150 psi. The valve body is machined from brass, providing reliable corrosion resistance in typical hydraulic, pneumatic, and plumbing service. Licensed plumbers, HVAC technicians, and fluid power mechanics install this type of drain cock when a compact, low-profile shutoff and drain point is required in a pressurized line or equipment port.

This drain cock is suited for residential and light commercial applications where a reliable drain or bleed point is needed on water lines, compressed air systems, boiler drain ports, or HVAC equipment. Its NPTF thread form provides a pressure-tight mechanical seal on connection, making it appropriate for systems where leak-free performance is critical without relying solely on thread sealant. The compact form factor fits in tight equipment bays and panel installations common in HVAC and plumbing rough-in work.

Key Features

• External seal design provides a reliable shutoff and drain function in a single compact valve
• 1/4-18 NPTF thread ensures a pressure-tight connection on both male and female fittings
• Brass body construction offers corrosion resistance for water, air, and compatible fluid service
• Rated to 150 psi maximum working pressure
• Minimum working temperature of -65 degrees F supports cold-environment installations
• Lightweight construction at approximately 0.046 pounds

Compatibility

Designed as an OEM-style replacement or service fitting for systems using 1/4-18 NPTF drain cock connections in plumbing, HVAC, and compressed air applications.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable IPC or IFGC requirements. Shut off system pressure and relieve any residual pressure before removing or installing a drain cock. Apply thread sealant or PTFE tape as appropriate for the service fluid, noting that NPTF threads are designed for metal-to-metal sealing but sealant is commonly used in practice. Do not overtighten brass fittings, as the material is susceptible to thread damage under excessive torque.