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useca to create a mini oven around the secon ary containment fitting. Wrap foil around the fitting and cinch the ends down. Cut a 10" to 12" (250 to 300 mm) section of 2'' (50 mm) or 3" (75 mm) pipe and place inside the foil. Place heat gun in the end of the pipe. Do not place heat gun any closer than 12" from the fitting. Cure time is approximately 15 minutes. For a proper cure, maintain the temperature between 250°F (1210C) and 400°F (2040C). TESTING RECOMMENDATIONS For Secondary Containment Piping Secondary containment piping, 3"-6" (75 mm and 150 mm) di- ameter sizes, can be pressure tested by installing an in-line tee with a pressure gauge and a nipple in the 3/4" threaded outlet of a termination fitting. If the test piping is to be installed tempo- rarily, use care not to over tighten when installing the steel pipe threads. Fiberglass threads may be damaged when removing the steel threads if over tightened. Use soft-set, non-metallic thread dope only. Fiber Glass Systems recommends testing YA" and 6" (75, 100 and 150 mm) secondary containment piping systems with air at pressures not to exceed 10 psig (0.069 MPa). The most con- venient place to introduce air for the containment piping pres- sure test is at the threaded outlet located on the termination fitting near the underground storage tank. The system should stay pressurized until the installation is completed to monitor for possible damage to the containment piping system during additional construction. The low pressure and low volume of the sec- ondary containment piping system makes ` air testing a relatively : 3 {M safe procedure if nor- mal safety precautions # ` are followed. Refer to air safety precautions.