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A water softener in daily use on a potable water supply gen- <br />erally requires no special attention other than keeping the <br />salt tank filled. Occasionally, however, a unit may require <br />sanitization under one of the following conditions: <br />• At start-up time. <br />• After standing idle for a week or more. <br />• On private supplies, the appearance of off -tastes and <br />odors, particularly if musty or "rotten egg" (caused by <br />harmless sulfate -reducing bacteria). <br />For occasional occurrences, the softener can be sanitized with <br />household bleach as follows. <br />NOTICE: If the water supply contains iron, regenerate the <br />softener before sanitizing to remove accumulated iron from <br />the Cullex® resin. <br />A WARNING! HAZARD FROM TOXIC FUMES! <br />CHLORINE BLEACH AND COMMON IRON <br />CONTROL CHEMICALS MAY GENERATE TOXIC <br />FUMES WHEN MIXED. <br />Sanitizing Procedure <br />IFTHE UNIT USES CULLIGAN®SOFNER-GARD.im OR <br />OTHER COMPOUNDS CONTAINING SODIUM <br />HYDROSULFITE OR SODIUM BISULFITE, OR ANY <br />OTHER REDUCING AGENT, DISCONNECT THE <br />DEVICE AND MANUALLY REGENERATE THE UNIT <br />BEFORE SANITIZING. <br />• DO NOT USE THIS PROCEDURE IF THE SOFTENER <br />SALT CONTAINS IRON CONTROL ADDITIVES. <br />1. Remove the brine tank cover and the small cover on the, <br />brine valve chamber. <br />2. Pour directly into the brine chamber 1 cup of common <br />household bleach (5-1/4% sodium hypochlorite) for each <br />cubic foot of Cullex resin in the tank. <br />3. Manually start recharge. Allow the unit to complete the <br />recharge cycle automatically. <br />If tastes and odors return frequently, even after sanitization, <br />a continuous chlorination system may be needed. Have the <br />customer send a sample to a qualified laboratory for <br />bacterial analysis. <br />SANITIZING PROCEDURE / 23 <br />