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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 /> a' <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 Press-u-re for Open System <br /> Feet of Head* Test Pressure 7 <br /> 2 1 .0 <br /> 4 2.0 <br /> 6 2.5 <br /> 8 3.0 <br /> 10 4.0 <br /> 12 5.0 <br />