Although GF Harvel FlameTech maintains its physical properties when exposed to many substances, exposure to certain chemicals can affect the clarity of the pipe over time. Certain nitrogen-containing organics, bleaches, oxidative agents and acids may result in discoloration. Exposure to sunlight (U.V.R.) will also affect clarity. These facts should be considered and testing under actual use conditions is recommended. GF Harvel does not recommend the use of this product for pressurized fluid applications or for the transportation or storage of compressed air or gases. Standard threading or grooving of GF Harvel FlameTech is not recommended due to insufficient wall thickness.