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Matrix of Metallic Pipe Monitoring Applications <br />Gravity Flow, Vacuum (V), Pressure (P), and Interstitial Liquid Level Monitoring (ILLM) <br />(Enclosure to State Water Board letter dated February 29, 2008; Matrix Updated April 25, 2014) <br />Metallic Pipe Manufacturer <br />UL 971A <br />Secondary Containment <br />Open <br />Closed <br />Brand <br />Type and Size <br />Fuels <br />(min. 5 psi rating on SC per UI_) <br />(min. 50 psi rating on SC per UL) <br />(Coaxial reported as ID of PS; <br />Gravity Flow or <br />Vacuum, Pressure, or <br />SOS reported as OD of SC) <br />Ambient ILLM <br />Pressurized ILLM <br />Brugg <br />Flexwell <br />Flexible; Coaxial (coil); 1", 11/2", 2" <br />MV,CT,HB,AM <br />Gravity Flow <br />V, P <br />Flexible; Coaxial (coil); 3" <br />MV,CT,HB,AM <br />Gravity Flow <br />None <br />Brugg <br />SECON-X <br />Flexible; Coaxial (coil); 1", 11/2" <br />MV,CT,HB,AM <br />Gravity Flow <br />V, P <br />Flexible; Coaxial (coil); 2", 21/2", 3" <br />MV,CT,HB,AM <br />Gravity Flow <br />None <br />OmegaFlex <br />DoubleTrac <br />Flexible; Coaxial (coil); 1", 11/z", 2", 3" <br />MV,CT,HB,AM <br />Gravity Flow <br />V, P <br />Flexible; Coaxial (coil); 4" <br />MV,CT,HB,AM <br />Gravity Flow <br />None <br />Page 2 of 3 <br />