Parker V406P-4 Brass Drain Cock Shutoff Valve Nptf

Product Description

The PARKER V406P-4 is a brass drain cock shutoff valve designed for low-pressure fluid control and drainage applications. It features a 1/4-18 NPTF female pipe thread connection and a maximum working pressure of 30 psi. Built from solid brass, this valve provides reliable corrosion resistance in plumbing, HVAC, and light industrial drain service. It handles a minimum working temperature of -40 degrees F, making it suitable for cold-weather installations. Licensed plumbers and HVAC technicians install this type of valve where a manual drain or isolation point is needed on a low-pressure line. The compact 0.42-pound body keeps it practical in tight spaces.

This drain cock valve is used in residential and light commercial systems where a manual shutoff or drain point is required on a low-pressure water or fluid line. Common applications include boiler drain ports, compressor drain points, water line service valves, and HVAC equipment drain connections. Its NPTF thread form provides a pressure-tight seal without requiring a separate sealant, though thread sealant tape is standard practice in most installations. The 1/4-18 thread size fits standard quarter-inch pipe fittings found throughout plumbing and HVAC equipment.

Key Features

• Brass body construction for corrosion resistance in water and fluid service
• 1/4-18 NPTF female pipe thread for a pressure-tight mechanical seal
• Rated to 30 psi maximum working pressure
• Rated to -40 degrees F minimum working temperature for cold-weather use
• Compact and lightweight at 0.42 pounds for installation in confined spaces

Compatibility

Designed as an OEM-style replacement or new-install drain cock for any system using standard 1/4-18 NPTF female pipe thread connections rated at 30 psi or below.

Installation Notes

A licensed plumber or HVAC technician should install this valve in compliance with applicable IPC or local plumbing codes. Shut off the water supply and relieve all system pressure before removing or installing any drain cock. Apply thread sealant tape to male threads before making up the connection and tighten to hand-tight plus the appropriate turns for brass fittings. Do not exceed the 30 psi maximum rated working pressure.