Do not use LASCO fittings for compressed air or gases. Not to be used in the hot or cold water distribution system in a dwelling. Do not test PVC piping systems with compressed air or gases. Do not use fittings with liquids not recommended by LASCO. Modification of fittings voids the warranty. Maximum Operating Temperature: 60 deg C (Note: At the maximum operating temperature for PVC the strength is derated to approximately 20% of the strength at 23 deg C)