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IMPORTANT: The instructions below for the 7150 Upper Tube Length = C + (A) Overfill Prevention Valve are written for the initial stage shutoff at 95%, but can be adjusted to shutoff For testable models only, endings In "T": at any desired tank capacity. Please contact the Au- Upper Tube Length = C + (A) -- 1 -1 /2" thorny Having Jurisdiction (AHJ) and review local, state, and national codes to determine the regulates YES Upper tube length Is &1 /z" plus the riser pipe ry requirements governing shut-off capacity in your measurement (A). region, as well as take Into account other considerate tions such as extreme tank tilt. In all cases, the up- Upper Tube Length = &1 /2" + (A) per tube must protrude into the tank at least 61 /2" to ensure that the valve can shut off flow into the For testable models only, ending in "°T'": tank completely before the tap of the tank Is wetted Upper Tube Length = 6"1 /2" + (A) - 1 "I 12r as per EPA requirements . NOTE: You must find the actual tank capacity num" HOW TO LOCATE THE POSITION OF THE. 71 SO AT ber that correlates to the 6-112" + (A) depth for the 95 % TANK CAPACITY station records. This number may also be used for Ift (Shut-opoints can be adjusted to any capacity to the purposes of calibrating an electronic tank level comply with AHJ Requirements) system. The length of the upper tube and the placement of the Taps measure 7150 valve body determine the shut-off point. Follow- Ing the standard instructions for the OPW 7150 will pro " vide for initial shutoff at 95%. In all cases, the upper tube length must be a minimum of 6- 1 /2" plus the length of the riser pipe. All length measurements are in inches. Riser Pipe INSTRUCTIONS with Face Seal A (A) Ac To Tank 1 ) find tank capacity (in gallons) from tank calibration Top {ank (g) chart provided by tank manufacturer. To Tank So om j 2) Calculate 95% of capacity Ll 3) Locate the 95% volume number on the tank callbra- tion chart. 4) Find the dipstick number (X) which corresponds to the 95% tank volume. And, find the dipstick num- Figure ? ber (Y) which corresponds to the 100% volume. 5) Subtract the dipstick number (X) from the tank di- EXAMPLE ameter (1) to find the upper tube reference number (Z) 1 ) For an Owens-Corning Model Cr3 Fiberglass" Tank Calibration Chart. (Y) - (X) _ (Z) Tank Capacity - I Or000 gal ., nominal 9A03 gait 6) Subtract 2" from (Z) to find the upper tube depth NOTE** Actium capacity 0111Y (C) 2) 95% of actual tank capacity = 0.95 x 9403 gal. _ {Z) 2„ — C 8933 gal . 3) The closest number which is less than 8933 gait Is 7) is C less than 61 /2"7 8910 gal. Choosing the closest number less than 95% of actual capacity ensures that the initial NO Upper tube length is C plus the distance from shutoff will occur when the tank is no more than the top of the Face Seal Adaptor installed on 95% full. the riser pipe to the inside, top lip of the storage 4) The calibration chart reading of 8910 gal. corre- tank (A) . sponds to a dipstick measurement of 82"0 4