Pinkish-orange algae in water lines
I have the translucent pex tubing that you can see through that is like the plastic in milk jugs. There is as light pinkish orange discoloration on the inside of the tubing. I believe it to be the sam...
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I get that in my house when I don't use my downstairs toilet after a while. And also when the cats water bowl sits unused for a few days. The red is from mineral deposits. It's not bad, but unless you can wipe out the inside of the lines your not going to get rid of it.
