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Flexible • • • • • • Manual environ 20.3 Air Pressure Testing for Stage II vent lines for both balanced and assisted systems. Gradually pressurize the piping's . IMPORTANT: GeoVent is available in both 2" and 3" interstitial space through the test sizes and is not intended for the transfer of fluids. tube to no more than 10 psi. During the pressurization period, apply an air pressure soap test to the entire 23.1 GeoVent Connections piping line. After testing, disconnect The GeoVent piping system requires the use of swivel couplings the air hose and lay the test tube down into the bottom of the tank &fittings or barbed fittings which are designed and U.L.a Listed sump. for direct burial applications eliminating the necessity for secondary containment. Unlike supply piping connections IMPORTANT: Coax fittings Environ permits GeoVent swivel and barbed connections to be require interstitial testing before and after backfill. direct buried. 21.0 ROUTINE SUMP INSPECTIONS >=: z�^x i. .KIle Visual inspections of all containment sumps should be made on a routine basis to check for water infiltration or for any signs of leaking product. An electronic or mechanical shut-off leak detection system is recommended for all containment sumps. ` When changing fuel filters at the dispenser, make sure an spilled product is cleaned out of the bottom of the dispenser ? '' ^� sump to prevent a possible fire hazard. 23.1.1 Tank Connections Within Tank Sump If the tank's vent connection is 22.0 PERIODIC INTERSTITIAL TESTING contained within a tank sump, the — For periodic integrity testing of the interstitial space of the vent line should enter through a _ GeoFlex®-D Pipe there is a different setup procedure for systems flexible entry boot.A male or female using coax fittings versus steel fittings with connector tubes. adapter fitting should be used to Both applications should have test tubes connected on each complete the connection within. end. If they have been disconnected then reconnect them before testing.Follow the air pressure test procedures below for interstitial integrity testing. 22.1 Reconnect Test Tubes If necessary, reconnect the test tube located inside the tank sump to the test boot. Connect the test gauge assembly to the 23.1.1 Tank Connections Extractor Fitting top end of the test tube. If the tank's vent connection is not contained within a tank sump,then a 22.2 Reconnect Connector Tubes male or female adapter fitting should be installed in the extractor fitting to If the piping system includes test boots with connector tubes accept the GeoDuct`I Piping. then make sure all connector tubes have been reconnected. 22.3 Plug Test Tube Plug and seal the test tube fitting located at the terminating end of the flexible piping line. 22.4 Air Pressurize 23.1.2 Pipe Branch Connections In between the beginning and end of 1� IT t, Pressurize the interstitial space to 10 psi for a period of one hour, a GeoVent piping line it may be In accordance with section 20 interstitial integrity testing If necessary to install tee fittings to required,disconnect all tubes after test. interconnect numerous pipe runs into a main return line to the tank. This piping application is most 23.0 GEOVENT'" FLEXIBLE VENT PIPING common with stage II vapor recovery lines. For this application the coax This flexible piping is used for the transmission of aromatic fuel junction tee or coax branch tee may vapors and is designed for direct burial of the pipe and fittings be used. without the requirement for secondary containment. The intended use for GeoVent is for venting vapors from an underground storage tank to a remotely located vent stack or 23