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JPA 17diI <br />ENVIRONMENTAL HEALTH <br />GrR,'-�.RTMENT <br />For "In Service" Secondary Containment <br />Secondary Containment piping systems can be tested after <br />the line has been installed and in operation for a period of <br />time. All systems must be shut off before testing. It is rec- <br />ommended that where possible, the air input valve be in a <br />different location than the pressure gauge. Please read and <br />understand all safety instructions and considerations in the <br />Installation Manual before testing. <br />Closed System <br />Test 3" (75 mm) and 4" (100 mm) secondary containment <br />closed systems with air at pressures not to exceed 10 psig <br />(0.069 MPa). Pressure should be left on the system for a mini- <br />mum of one hour. The test pressure should not exceed the <br />pressure rating of any component in the piping system. <br />Open System (Gravity Drain) <br />Test 3-6"(75-100 mm) secondary containment open systems <br />with air to the equivalent static head test pressure listed in the <br />table below. The pressure should be left on the system for <br />a minimum of one hour, or long enough to soap the joints. <br />The system must be temporarily sealed during testing. Do not <br />exceed the pressure rating of any component in the piping <br />system. <br />Test Pressure <br />for Open System <br />Feet of Head* <br />Test Pressure <br />I <br />55 <br />