For current factory product specifications please refer to the John Guest Web Site

Working Pressure and Temperature Range:

Super Speedfit fittings are suitable for the following pressures and temperatures.


Also suitable for vacuum

Depending on the tube used, under certain conditions fittings may be used at higher pressures and temperatures. Please refer to John Guest Customer Service Department/website for guidance.

Note: 1 Bar = 14.5 PSIG.

Tube Types:

Plastic Tube - Polyethylene, nylon and polyurethane conforming to the tolerances shown below. For soft tubing or thin wall tube we recommend the use of tube inserts.

Braided Tube - Use of Tube to Hose Stems is essential when using tube. Use of clamps to retain braided tube on barbs is recommended.

Metal Tube (soft) - Brass, copper or mild steel conforming to the tolerances below

Metal Tube (hard) - We do not recommend Super Speedfit fittings for hard metal tubes or chromium plated tubes.

For stainless steel and other polished metal tubes we recommend the use of SuperSeal fittings.

It is essential that outside diameters be free from score marks and that the tube be deburred before inserting the fitting.