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How can I tell if a WM48 Zoeller Sump pump is operational. It appears the water level is over the float.

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Depending on the sensitivity of the float switch you may find that the float must be completely upside-down for the pump to turn on. The easiest way to check if the pump works is grab the float by hand and hold it in the inverted position - if your pump kicks in and starts pumping you know the pump itself works and you may want to adjust your float (I use tie-straps around the handle and around the float cord to artificially shorten the float). If your pump does not pump water when the float is inverted try shaking the float to see if the inner switch is stuck. Hope that helps.

Posted on May 03, 2011

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