Circulator Help

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hyperwiz

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My Taco circulator pump has either a bad cartridge or motor assembly. I'm going to start with the cartridge and if that doesn't work replacement the entire unit. Not having worked on water heaters before, I'm trying to understand water flow and the best way to remove the unit without flooding my garage.

I've attached pictures. Is it fair to assume that I need to do the following to make this repair...
1. Turn off the water supply at the top of the right water heater (red handle)
2. Turn off both water heaters
3. Turn off the yellow valve below the Taco circulator unit
4. Remove pressure from both water heaters (top pressure relief valve)
5. Drain the left water heater (attach hose to outlet and drain)

Am I thinking about this correctly. Is there an easier process to do this?
 

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Jadnashua

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WHere does the outlet of the pump go? If you shut the valve below it, there may be no reason to drain either tank.
 

hyperwiz

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I'm actually not sure. The pipe at the top of the circulator pump goes back into the wall (has insulation on it). At the bottom of the pump, there's a yellow valve and that piping goes into the left water heater. Thoughts?
 

Jadnashua

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It could be a pump for hot water recycling. If you shut off the water to the WH and relieve the pressure in the system, when you open up the fittings, the only water that should be there is what's in the pipe. Now, if you use those WH for radiant floor heating or something, there could be a lot more water in the system. Sorry, just do not have enough info.
 

hyperwiz

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It's definitely a pump for hot water circulation to the fixtures (not radiant flooring). I'll try that (relieve pressure and then open up the fixtures before removing the pump).
 
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