Parker PP6BU4 Bulkhead Union 3/8 X 1/4 Inch Od Polypropylene

Product Description

The PARKER PP6BU4 is a push-to-connect bulkhead union tube fitting designed to join two tube runs through a panel or wall without the need for threading or soldering. Constructed from polypropylene in a tan finish, this fitting accepts 3/8 inch OD on one side and 1/4 inch OD on the other, allowing a reducer-style bulkhead connection in a single component. It is rated to 150 psi and provides a quick, tool-free tube insertion and release mechanism suited to pneumatic and fluid distribution systems. Plumbers, HVAC technicians, and industrial service pros use this fitting where tubing must pass cleanly through a bulkhead or enclosure panel.

This fitting is appropriate for light commercial and residential applications where polypropylene compatibility is acceptable for the fluid or gas media in use. Typical installations include tubing routed through control panel walls, equipment enclosures, or partition boards where a secure, leak-resistant through-wall connection is needed. The push-to-connect design speeds service and replacement compared to compression or barb-style alternatives.

Key Features

• Push-to-connect mechanism for tool-free tube insertion and removal
• Bulkhead union configuration for through-panel or through-wall tube routing
• Reducer configuration: 3/8 inch OD inlet to 1/4 inch OD outlet
• Polypropylene construction offers chemical resistance for a range of fluid media
• Rated to 150 psi working pressure
• Tan color for easy visual identification in multi-fitting installations

Compatibility

Designed as an OEM-style push-to-connect replacement fitting for tube-to-tube bulkhead connections using 3/8 inch and 1/4 inch OD tubing in pneumatic or compatible fluid systems.

Installation Notes

Installation is performed by qualified plumbing or HVAC technicians. Depressurize and drain the system completely before removing or installing any fitting. Ensure tubing ends are cut cleanly and squarely and are free of burrs before insertion to achieve a proper seal. Follow all applicable local plumbing and mechanical codes when routing tubing through panels or structural members.