In this video, Greg demonstrates the removal of an older inoperative recirc pump an its replacement with a modern Grundfos COMFORT pump. http://www.grundfos.com/products/find...

You'll learn how the pump operates, its design advantages, and the step by step procedure from draining the water heater, removing the old pump, and a typical installation of new plumbing for the replacement pump.

See the companion page for this video on DIY Plumbing Advice.com
http://diyplumbingadvice.com/waterhea...

For more information, and other DIY plumbing information be sure to visit http://DIYplumbingAdvice.com, and see my other plumbing videos.
If you have a question, you can leave it in the comments, as I will answer all of them there.