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  1. Yep, that's my thinking as well. When it's shot,...

    Yep, that's my thinking as well. When it's shot, I'll pull it and go with a tank.
  2. Jastori - Thanks for the clarification. That...

    Jastori - Thanks for the clarification. That makes sense and is consistent with what I decided last night after looking at the system a bit more.

    I'm pretty convinced the error code I mentioned...
  3. Ok, so I just took the cover off the Takagi TK-3...

    Ok, so I just took the cover off the Takagi TK-3 water heater and pushed a button that's supposed to bring up any error codes. I threw a 3-2-1 code which maps to "Inlet Thermistor Fail" Assuming...
  4. Ok, so there's an arrow on the back of the pump...

    Ok, so there's an arrow on the back of the pump that would indicate the pump is indeed pumping left to right. So the ??? line is in fact the hot water return.

    Now I'm curious about the green...
  5. Ewww… Good question. That would make more sense...

    Ewww… Good question. That would make more sense if the pump was pushing water to the right. It seems like that green valve (barely visible behind the yellow gas line in the photo) would need to be...
  6. Good debate on the degree to which temperature,...

    Good debate on the degree to which temperature, flow, and mineral content all play a role in corrosion. :)

    I've been staring at my plumbing this weekend trying to figure out how it's set-up.
    ...
  7. HJ - I don't see anything that obviously looks...

    HJ - I don't see anything that obviously looks like a check valve or tempering valve at the heater but it's possible that there's one there and I'm just missing it? Here's a better picture... What...
  8. Interesting. So it's really just a switch. That...

    Interesting. So it's really just a switch. That would explain why the manual doesn't mention anything about setting a temperature or time. I don't *think* the hot water heater has a timer built in...
  9. Thanks for the reply Jim. Yeah, I saw lots of...

    Thanks for the reply Jim.

    Yeah, I saw lots of information about tankless hot water heaters not being supported with recirc pumps for various reasons. The manual on this TK3 said it has a built in...
  10. Understanding my tankless with recirc system

    Hey everyone,

    I'm new to the forum. This is my first post.

    I have a relatively large house (5000 square feet) with a natural gas powered tankless hot water heater paired with a recirc pump....
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