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HOW TO INSTALL THE OPW 6'I -SO <br /> IN VARIOUS SIZE TANKS Measuring <br /> Stick <br /> The shutoff point is determined by the length of <br /> the 61 SO upper tube. Following the standard <br /> instructions for the OPW 61 -SO will provide for <br /> initial shutoff at 95% of capacity in most 8' V <br /> diameter underground storage tanks. For other <br /> diameter tanks, follow the procedure below toq III B }determine proper length of the upper tube . In all To Tank <br /> cases; the upper tube length must be a minimum ( ) Bottom <br /> of 6AZ' plus the length of the riser pipe. All Riser <br /> Pipe To Tank <br /> length measurements are in inches. Top (l .® .) <br /> INSTRUCTIONS <br /> 1 .) Find tank capacity (in gallons) from tank <br /> calibration chart provided by tank manufacturer. <br /> 2.) Calculate 95% of capacity. EXAMPLE <br /> 3 .) Locate the 95% volume number on the tank 1 .) For an Owens-Coming Model 13-3 <br /> calibration chart. Fiberglass® Tank Calibration Chart: <br /> 4.) Find the dipstick number pn which Tank Capacity - 10,000 gal. nominal (9,403 gal. <br /> corresponds to the 950/avolume number. actual) <br /> 5.) Subtract the dipstick number (X) from the tank 2 ) 95% of actual tank capacity = 0 .95 x <br /> diameter m to find the upper tube reference 9403 gal. = 8933 gal. <br /> number (2) . 3.) The closest number which is less than 8933 <br /> gal. is 8910 gal. Choosing the closest number <br /> (Y) - Q0 _ (z) less than 95% of actual capacity ensures that the <br /> 6.) Subtract 2" from the upper tube reference initial shutoff will occur when the tank is no more <br /> number (Z) to find the upper tube depth number than 95% full. <br /> (C)• 4 .) The calibration chart reading of 8910 gal . <br /> (Z) - 2`= C corresponds to a dipstick measurement of 82". <br /> 5.) Dipstick number (X) = 82" <br /> 7.) Is C less than 6-1 /2"? Tank diameter (Y) = 92" <br /> NO Upper tube length is the upper tube - m = (Z) 92 " 82" = 10" <br /> Upper tube reference number (Z) <br /> depth number C plus the riser pipe = 10" <br /> measurement (A). 6 ) (Z) = 10" (from Step 5) <br /> Upper Tube Length = C + (A) (Z) - 2" = G 10" - 2" = 8" <br /> YES Upper thbe length is 6-1 /2" plus the riser C 8" <br /> - <br /> pipe measurement (A) . 7 ) Is C = 8 (from Step 6) less than 6-1 /2"? <br /> Upper Tube Length = 6-1 /2" + (A) <br /> NO Measure the riser pipe length (A) . <br /> Upper tube length = C + (A) <br /> C = 8" (from Step 6) <br /> ® Registered T.M. - Owens Coming Fiberglass Corporation Upper tube length = 8" + riser pipe <br /> length (A) . <br /> 3 <br /> 3 <br /> i <br />