this post was submitted on 05 Mar 2026
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I've done plumbing work before, it's all pipes, people. Piss to your heart's content, you're not hurting anything
in your country*
In any country, I would think.
Even where grey water systems are deployed for water re-use, shower water /is/ normally collected, but piss would be so diluted as to be a negligable contaminant. A shower uses roughly 70 litres of water. An average human bladder voiding is 400ml, so that works out at 0.57% piss in the grey water collected in a single shower. Negligable.
Piss away.
Source -Dr. I P Freely.
That's not even what I'm criticizing. You said you've done pipe jobs, and it's all pipes: you can only attest for where you have worked
And no, in some places water may be used very differently. Pee may contain a lot of unwanted chemicals, especially when the person is medicated
Edit: In cities in western countries of course most of the time it's all going to the same place. But I don't think that's why it's taboo to pee in the shower. It's because it's seen as unhealthy for the other people using the shower / bathtub