[SOLVED] How do I safely turn the water off for shower repair? So many handles!

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guido

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https://imgur.com/a/NNF6jhf

We have a tankless heater. I tried the following:

  • Turned tankless off with the power button.
Pic1:

  • Turned off green handle,
then had shower running, it seemed one of the 2 (cold & hot) turned off, but not the other.

  • So I turn off black.
The water slows down, but still more than a trickle, and after a couple minutes, it's still like that. I looked at all the valves at the tankless - Pic2 .

  • I flipped yellows
but then that pump that sits between started making a different noise, which made me insecure about what I was doing.

  • I reverted all and made photos and came here to ask:
How do I safely turn the water off for shower repair?
 

Terry

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If there is a recirc pump, then power to that gets turned off first.
The first incoming shutoff for the cold is the one I use when doing a shower repair. It doesn't do much to turn off the hot but leave the main cold on.
Sometimes I shut it off at the water meter.
 

guido

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Is this the recirc pump:

recirc-pump-wh-01.jpg


Or is that the gas coming in, and should I leave that alone?

Does it help if I shut off red and blue at the tankless?

It's definitely in recirc mode, but I thought that pump lived inside the tankless unit
 

guido

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Update: got it figured out, thanks @Terry!

I ended up looking at my tankless specs, mapped what was what. The gas was not that pipe, so it was indeed a circ pump.

Turned that off, tankless off
then closed pic1 green & black
pic2 red & bottom yellow

Water trickled for a while, but eventually stopped.
 
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