|  | When  the hot water circulator pump needs to be replaced, follow these steps.
 Arrange  your tools on a workbench or table so that they are clearly visible. Remove the  circulator pump. Place a bucket underneath the marked area to catch any water  that spills out when the bolts are removed. Loosen the flange bolts and remove  them, leaving one in place to steady the existing pump and hold it in place.  Measure the height of the new pump while the flanges are still attached to the  pump. Use a saw to cut the pipe in the designated area and remove the existing  circulator pump. Place the circulator pump between the existing flanges. Check  to make sure that the water flow will be facing the right direction. Attach the  gaskets or O-rings, whichever came with your hot water circulator pump, to the  existing flanges to prevent future water leaks. Reconnect the electric to the  pump.
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