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PREVENTATIVE MAINTENANCE Annually, inspect the flapper in the 7150 to see that it is open by looking down the drop tube opening. Test the 71 SO drop tube seals with CARB procedure TP -201.1 D. If the drop tube seal passes testing, no further mainte- nance is required. If the drop tube fails testing, replace the drop tube seal with OPW P/N: 1-111931 M for 4" Tubes. Re -test the 71 SO drop tube with CARB proce- d TP -201 1 D The lower tube o-rin seal DPW PIN: cations. Performance Requirement: Leak rate to be less than or equal to 0.17 CFH@2.0" W.C. Torque Specification Taptite Screws, #10-24 thread cutting, 20 in -lbs mini- mum to 35 in -lbs maximum. Testable Models Only: Socket Adaptor, 1/4" NPT, 3.5 ft -lbs (42 in -lbs) minimum to 5.0 ft -lbs (60 in -lbs) maximum. ure g H14840M can also be replaced. If this does not correct IMPORTANT: Leave these installation instructions the leak the 7150 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 for full 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 -0001 Float Kit. CAUTION: Do not insert any foreign object into drop tube if flapper is in the closed position. For exam- ple, 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 7150 is damaged and needs to be re - 7150 Performance Specifications This Overfill Prevention Valve has been manufactured and tested to, and met, the following California specifi- Appendix A 71 SO Overfill Valve Upper Tube Calculation Worksheet Important: This is meant to be supplemental worksheet and not a substitute to following the installation manual instructions. All length measurements are in inches. Please contact the Authority Having Jurisdic- tion (AHJ) and review local, state, and national codes to determine the regulatory requirements governing shut-off capacity in your region, as well as take into account other considerations such as extreme tank tilt. Desired tank capacity for shut-off: SO%=15, Dipstick Number on Tank Chart that corresponds to 100% volume (Y) _ 1�,r�--,��,m Dipstick Number on Tank Chart that corresponds to SO% (X) _ — I�L� (X) Upper Tube Reference NumberZ=Y-X + I (Z) Upper Tube Depth Inside Tank C = Z-2" 2 Distance from top sealing surface for 71 SO Lip' to inside the OZP (C) top of Storage Tan k2 A= 1p�r For Non -Testable 71 SO models only In all cases for non -testable 71 SO models, the top of the valve body must protrude at least 61/2" into the tank to provide a minimal clearance for proper operation? Additionally the total Upper Tube Length m e V4east of length to include the protective bend in the tube. Is C less than 61/2" Yes /0 If NO, Upper Tube Length (D)= C + A If YES, Upper Tube Length (D)= 61/2 "+ A Upper Tube Length For Testable 71 SO models only In all cases for Testable 7150 models, the top of the valve body must protrude at least 61/2" into the tank to provide a minimal clearance for proper operation.3 Additionally the total Upper Tube Length must be at least 141/2" of length to include the protective bend in the tube. Is C less than 5" Yes / No If NO, Upper Tube Length (D)= C + A -1 1/2 " If YES, Upper Tube Length (D) = 61h" + A - 1 1/2 Upper Tube Length = Sealing surface maybe the top of the Face Seal Adaptor, the built in sealing ledge inside some spill containers, or on non -vapor tight applications the top of the pipe nipple 2 Some Underground Storage tanks utilize manway system at the top. Make sure to use the top of the storage tank formeasure- mentandnottotopofthemanway. Consultyour underground tank manufacturer for height ofthe manway ' This measurement is taken from the seam where the upper tube is attached to the valve body to the inside ofthe tank top. 18 19