Parker DC604-2 Drain Cock Shutoff Valve 1/8 Inch Nptf

Product Description

The PARKER DC604-2 is a drain cock shutoff valve designed for use in compressed air, pneumatic, and fluid systems where controlled drainage or blowdown is required. Featuring an external seal design and a 1/8-27 NPTF threaded connection, this valve provides a reliable, leak-resistant seal without relying solely on thread engagement. The brass body resists corrosion and holds up to 150 psi maximum working pressure. Its compact form factor makes it well-suited for tight installations on tanks, manifolds, air receivers, and line equipment. Installation is performed by licensed plumbers, pipefitters, or HVAC technicians depending on the application.

The DC604-2 is used in residential and light commercial applications where a small-bore shutoff or drain point is needed on pressurized systems. Typical installations include air compressor tanks, pneumatic control lines, condensate drain points on HVAC equipment, and low-pressure hydraulic circuits. The 1/8-27 NPTF thread is a standard pipe thread size compatible with a wide range of fittings and manifold ports commonly found in trade plumbing and mechanical systems. The external seal design helps maintain a positive shutoff even under system vibration or thermal cycling.

Key Features

• External seal design provides reliable shutoff independent of thread-only sealing
• 1/8-27 NPTF thread for standard pipe compatibility
• Brass body construction for corrosion resistance in air and fluid service
• 150 psi maximum working pressure rating
• Rated for minimum working temperature of -65 degrees F
• Compact size suitable for tight-clearance drain and blowdown locations

Compatibility

Designed as an OEM-style replacement or new-installation drain cock for systems with 1/8-27 NPTF threaded ports in compressed air, pneumatic, HVAC, and light fluid-handling applications.

Installation Notes

Depressurize and isolate the system completely before removing or installing this valve. Apply thread sealant or PTFE tape appropriate for the service fluid to the NPTF threads before installation. Hand-tighten first, then use a wrench to bring the fitting to proper engagement without overtightening, which can crack brass fittings. Work should follow applicable plumbing and mechanical codes including IPC and IFGC guidelines where relevant.