this post was submitted on 15 Jan 2026
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[–] 4am@lemmy.zip -1 points 14 hours ago (2 children)

This doesn’t even make sense from a plumbing perspective

[–] mrgoosmoos@lemmy.ca 14 points 14 hours ago* (last edited 14 hours ago) (1 children)

that's what I thought at first, but there is actually a way that it makes sense

you have hot water and cold water with a certain amount of pressure behind them feeding your apmt. if you turn the shower to full hot, the valve is still going to mix it with cold water. however if you take the cold water out at the sink prior to the shower feed, it's not going to be replaced by more cold water if the system doesn't have enough supply to keep up with it. so your shower water is being mixed with less cold water than before, resulting in a hotter mixed stream from the shower head

and like maybe there's other things going on and it's not the same in every situation and all that, but you can test this yourself and get this result, so..

[–] echodot@feddit.uk 2 points 8 hours ago* (last edited 8 hours ago) (2 children)

Do you not have a temperature dial on your shower that lets you control this directly? If I feel like I need to burn my skin off I can turn the temperature all the way up and have 100% hot water.

[–] mrgoosmoos@lemmy.ca 2 points 41 minutes ago

must be nice to have such a hot water supply with high pressure

not everybody has that

[–] mech@feddit.org 4 points 6 hours ago (1 children)

Check your hot shower privilege

[–] Evil_Shrubbery@thelemmy.club 2 points 5 hours ago

My golden shower offers constant warm temperature, but twisting the knobs does nothing.

[–] KeenFlame@feddit.nu 4 points 14 hours ago

I don't know what world you are from but my showers have also gone hot when the toilet is flushed