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CONTACT''" FOR MORE INFORMATION! <br />tern 5555 Skylone Blvd., a A / Santa Rosa, CA 95403 <br />rglass Ph: (800) 688-3375 / Fx: (800) 700-1188 <br />www.westernfg.com <br />Vapor Pot <br />INSTALLATION INSTRUCTIONS <br />Please read this manual completely prior to installation. These instructions do <br />not supersede local laws and regulations. Always comply with local <br />requirements. <br />Stage II Vapor Pots provide a step up point for vapor recovery piping runs <br />that cannot maintain sufficient slope towards the UST, underground storage <br />tank. Vapor sumps are available in single or double wall construction to <br />satisfy local jurisdictional requirements. Vapor pots may be vertical or <br />horizontal oriented. The sumps may be emptied or drained by manual pump, <br />gravity return drain, automatic powered pump system or vacuum assisted <br />evacuation via the submersible pump in the storage tank/s. <br />1). Locate vapor pot/sump so as to provide sufficient fall for vapor line to <br />achieve gravity flow back to selected storage tank. It must be close enough <br />so that a 1/8 to 1/4 inch pipe fall will terminate at the desired location <br />relative to the tank. <br />2). Vapor pot/sump must have sufficient bury to protect against traffic loads <br />from above. Recommended backfill material is rounded pea gravel 1/8" to <br />3/4" in diameter. Crushed stone, 1/8" to 3/4", and or river sand may be used <br />if washed and it is free flowing. A 6" base of back fill material should be <br />placed below the vapor pot/sumps before placement. <br />3). If installed under reinforced concrete surfaces of a 4" (100mm) thickness, <br />a minimum cover of 6" of back fill is required. Asphalt, 2" (50mm) minimum <br />thickness, requires 8" minimum cover of back fill. Unpaved surfaces require a <br />minimum of 14" (350mm) cover of recommended back fill material. <br />4). Dry fit piping manifold and return line if used. A 8" to 12" access manhole <br />is recommended above manifold to allow inspection and/or cleaning (see <br />details). <br />5). Secure and test piping system. Vapor pots/sumps may be pressure tested <br />to maintain 5psi. Use care when pressurizing vapor pot/sump as the volume is <br />small and will quickly reach pressure limits. <br />6). Back fill as required. <br />Page 37 of 38 <br />