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

Acetal Fittings

5/32" – 5/16"
4mm – 8mm
3/8" -1/2"
10mm – 22mm
Potable Liquids and Air
-4°F230 psi150 psi
-20°C(16 Bar)(10 Bar)
+33°F230 psi150 psi
+1°C(16 Bar)(10 Bar)
+68°F230 psi150 psi
+20°C(16 Bar)(10 Bar)
+150°F150 psi100 psi
+65°C(10 Bar)(7 Bar)

Polypropylene Fittings

+70°F150 psi
+20°C(10 Bar)
+140°F60 psi
+60°C(4 Bar)

The minimum temperature for the polypropylene is 33°F/1°C.
The polypropylene fittings are not suitable for compressed air application. The acetal Super Speedfit® fittings are what they recommended for compressed air applications.

Title: What are the working pressures and temperature ratings for the John Guest® Super Speedfit® fittings?
Description: Working pressure and temperature range for Acetal fittings
Published: 1/24/2012
Last Edited: 1/19/2023
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