Smc Pneumatics KQ2U09-00A Union Y Fitting 5/16 Inch Od

Product Description

The SMC PNEUMATICS KQ2U09-00A is a push-to-connect union Y fitting designed for joining three pneumatic or fluid tubing lines at a single junction point. It accepts tubing with a 5/16 inch outside diameter and supports a maximum working pressure of 145 psi. The fitting body is brass with polybutylene contact components, giving it solid corrosion resistance in compressed air and light fluid service. Its tool-free push-in connection makes field installation fast and repeatable. HVAC, pneumatic control, and plumbing technicians use this type of fitting wherever a single tube run needs to be split or merged without threaded adapters.

This fitting is suited for residential and light commercial pneumatic control systems, instrument air lines, and low-pressure fluid distribution. The Y configuration allows one inlet to branch into two outlet legs or consolidates two lines into one, depending on flow direction. It is appropriate for use in environments where operating temperatures range from 23 degrees F to 140 degrees F, making it compatible with typical indoor mechanical room and equipment closet conditions.

Key Features

• Push-to-connect design - no tools required for tube insertion
• Union Y configuration joins three 5/16 inch OD tube lines at one fitting
• Rated to 145 psi maximum working pressure
• Brass body with polybutylene components for corrosion resistance
• Operating temperature range: 23 degrees F to 140 degrees F
• RoHS compliant

Compatibility

Designed as an OEM-style push-to-connect replacement fitting for pneumatic control and fluid distribution systems using 5/16 inch OD tubing.

Installation Notes

Installation is performed by licensed HVAC technicians, pipefitters, or pneumatic system technicians. Depressurize and isolate the line completely before removing any existing fittings or inserting new ones. Confirm tubing outside diameter is clean, burr-free, and cut square before seating it into the fitting to ensure a leak-free connection. Verify the final assembly at working pressure with an appropriate leak-detection method before returning the system to service.