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7' Max. <br />4' Min. <br />High End <br />of Tank - <br />Optional <br />2" Slope <br />Fiberglas® Reservoir <br />Hydrostatic Monitor System <br />Filling with Liquid <br />CAUTION: <br />• The liquid to fill the cavity must be gravity fed by pouring <br />liquid into the standpipe. <br />•A water hose may be used only if it is not screwed or attached <br />to any of monitoring fittings. <br />• Do not connect a pressurized hose directly to the monitoring <br />fitting or you will over -pressurize the cavity and could cause <br />tank damage. <br />DO <br />• If the tank is sloped, fill annular space from low end <br />of sloped tank. <br />• Continue to fill cavity with water until liquid begins to <br />overflow standpipes. <br />• Refill cavity through the fill standpipe. <br />After Filling Is Complete <br />• Disconnect standpipe at the monitoring fitting. <br />❑ Replace and tighten fitting plug. <br />• Standpipe in reservoir remains connected to reservoir <br />monitoring fitting (annular space fitting for 4' tanks). <br />• Gravity fill cavity and remaining standpipe in <br />reservoir until liquid level in standpipe is at least 2' <br />higher than tank top. <br />Testing <br />• Continue refilling to the 2' level on the standpipe until the <br />liquid level stabilizes (less than 1" drop in 4 hours). <br />• If backfilling after filling annular space, thoroughly check <br />outer tank for leaks. <br />❑ An exterior leak detected before backfilling is simple to <br />repair. <br />❑ Do not backfill a tank with a known or suspected leak in <br />the outer wall. <br />Note: In the unlikely event a tank leak is discovered, <br />call Owens-Corning Field Service at numbers on <br />page 2. <br />• Remove a primary tank fitting plug and inspect the inner <br />tank for any signs of liquid, which could indicate an inner <br />wall leak. <br />• After the liquid level has stabilized: <br />❑ Disconnect the remaining fill standpipe in reservoir. <br />• Place permanent riser pipe in reservoir fitting (annular <br />space fitting for 4' tanks) to grade, check reservoir liquid <br />level by inserting a dipstick in the reservoir riser pipe <br />using water finder paste. <br />• Determine if reservoir is 1/2 full by using the <br />following reservoir liquid level measurements. <br />Tank <br />Diameter <br />Reservoir Liquid <br />Level Measurement <br />4' <br />5" <br />6' <br />4" <br />8',10'* <br />4" <br />10'** <br />9" <br />* 10,000, 12,000, 15,000 and 20,000 gallon tanks only. <br />** 25,000 and 30,000 gallon tanks only. <br />• Additional fluid may be added, if necessary, so that <br />the Fiberglas reservoir is 1/2 full. <br />C5. Fiberglas° Reservoir Sensor <br />Monitoring Liquid Level in Fiberglas Reservoir <br />• Periodically, by using a dipstick. <br />• Continuously, by using optional reservoir sensor (in <br />conjunction with an optional electronic control <br />panel). <br />LJ Monitoring sensor is placed into reservoir (annular <br />space fitting for 4' tanks) through a 4" diameter riser <br />pipe from grade. <br />Reservoir Sensor <br />Model RS10 Shown <br />Flexible conduit <br />Adjustable <br />lead cable )) <br />Vent holes <br />High liquid <br />Riser pipe <br />level switch <br />cap <br />cap <br />Riser pipe <br />fitting <br />4" Diameter <br />Low liquid <br />Internally Adjustable <br />level switch <br />threaded lead cable <br />Perforated <br />plastic casing <br />Continued on next page. <br />15 <br />