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G6300 John Guest Speedfit® Fittings

Grey acetyl copolymer construction with nitrile o-rings. FDA approved materials on all wetted surfaces. Meet NSF International Standards 51 and 61.

Recommended for use with:
  • polyethylene, nylon, polyurethane tubing and other plastic tubing*
  • soft metals such as brass and copper
*Note: When using with soft durometer tubing such as PVC, we recommend using tube inserts.

Not recommended for:
  • hard or chrome plated metal tubing
  • explosive gases
  • fuels
  • central heating or in-floor radiant heating

G6400 series with white polypropylene with EPDM o-rings are also available.

Temperature range: -20°C (-4°F) to 70°C (158°F).

Pressure ratings*:
Up to 5/16" tubing....
  • 230psi at 20°C (68°F)
  • 150psi at 70°C (158°F)
3/8" & 1/2" tubing....
  • 150psi at 20°C (68°F)
  • 100psi at 70°C (158°F)
*Note: Pressure ratings of tubing may be less. The lower of the two will determine the rated pressure of the system.

Maximum tightening torque:
1/8" - 1/4" 1.0ft lbs (1.4Nm)
3/8" - 1/2" 2/2ft lbs (3.0Nm)

To attach fittings:
-cut the tubing square and remove burrs and sharp edges that may damage o-ring
-make sure end of tube is free of score marks that may cause leak paths
-for very soft tubing or hot water systems, use a tube insert
-push the tube into and up to the stop
-pull the fitting back to make sure it is secure
-test the system

To release fittings:
-to release system pressure
-push collet back squarely against the fitting body
-remove tubing

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