John Guest USA 5/16" X 5/16" Union Connector PM0408S - PM0408S-US

John Guest USA 5/16 Inch Union Connector - PM0408S-US

Make a clean spec-match tubing connection with this universal/spec-match John Guest USA 5/16 Inch Union Connector - PM0408S-US. This push-to-connect union connector joins two matching sections of plastic tubing in refrigerator water, ice maker, filtration, or beverage-line service applications.

PM0408S-US is a universal/spec-match John Guest USA push-to-connect union connector for refrigerator water line, ice maker line, filtration, and beverage tubing service where the tubing size and material requirements match.

Application: Universal/spec-match refrigerator water line, ice maker line, filtration, and beverage tubing applications that use the exact tube outside diameter and push-to-connect style.

Fitment / What To Verify: Verify the tubing outside diameter on both sides, John Guest series, material compatibility, pressure/temperature requirements, and whether the application uses potable water. This is a spec-match fitting, not model-specific appliance compatibility.

Please confirm tube outside diameter and application requirements before ordering.

Is it time to replace?

• Common Symptoms: Water seepage at a tubing joint, cracked old connector, line repair after cutting out a damaged section, or a tubing route that needs a straight union.
• Visible/Sensory Cues: Cracked fitting body, damaged collet, tubing that will not lock, or a scratched tube end that leaks after insertion.

Pro Tip: Cut tubing square, fully insert to the tube stop, and tug gently to confirm the tube is locked before restoring water pressure.

Technical Specifications