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PREVENTATIVE MAINTENANCE cations. Performance Requirement; Leak rate to be less Annually, Inspect the flapper In the 71 S© to see that it Is than or equal to 0. 17 CFH@2.0" W.C. open by looking dawn the drop tube opening. Test the 71 SO drop tube seals with CARE procedure TP-21]i7 .1 D. Torque Specification If the drop tube seal passes testing, no further mainte- Taptite Screws, # 10-24 thread cutting, 20 In" Ibs mini- nance Is required . If the drop tube fails testing, replace mum to 35 in-lbs maximum. Testable Models Only: the drop tube seal with OPW P/N: H11931 M for 4" Socket Adaptor, l /4" NPT, 3.5 ftlbs {42 in-lbs} minimum Tubes. Re-test the 7150 drop tube with GARB proce- to 5.0 €t lbs (60 in-lbs) maximum . lure TP-201 .1 D. The lower tube o- ring seal OPW P/N: H 14840M can also be replaced. If this does not correct IMPORTANT: Leave these installation instructions the leak the 71 SO needs to be replaced. and maintenance procedures with the station opera- tor, FOR TESTABLE MODELS ONLY: The socket adaptor can be removed and poppet and float movement and function inspected without removing the valve. See Page 17 forfull testing details. If replacement parts are needed for testable models the following Items are available: OPW P/N 206741 Testable Inlet Tube S/A, 206740 Socket Adaptor and Cable Assembly, and 61 SOK L0QQJ,FIoat Kit. CAUTION: Do not insert any foreign object into drop tube if flapper is in the closed position. For exam- pie, a tank level measuring stick . This will damage the valve and void the Warranty, ALWAYS check flapper location before "sticking" the tank. if flap= per Is in the closed position, the tank is either over- filled and you need to wait until the liquid level goes down or the 71SO is damaged and needs to be re, I '. 71 $ O Performance Specifications This Overfill Prevention Valve has been manufactured and tested to, and met, the following California speclfi- r 18