All RLS refrigerant press fittings are approved for use with the refrigerants listed below. Contact us about special blends or other refrigerants not listed here. Check your local codes to ensure that RLS fittings are suitable for use with your particular refrigerant.
| R-134A | R-404A | R-407A | R-407C |
| R-407F | R-407H | R-410A | R-417A |
| R-421A | R-422B | R-422D | R424A |
| R-427A | R-434A | R-437A | R-438A |
| R-448A | R-449A | R-450A | R-452A |
| R-453A | R-456A | R-507A | R-513A |
| R-513B | R-718 | Ethylene Glycol |
RLS fittings are also compatible with the following industrial (non-refrigerant) gasses: nitrogen, argon, helium and oxygen (non-medical).