I’m not a plumbing expert (I got an electronic degree before going for CS), but I can extrapolate from my own experience.
If it does like electricity, it comes from how much water the main line can let through. If it is sufficiently sized, and can accept enough water for both your tap and shower, all you’ll see is a pressure fluctuations (it will be divided per open tap). But if it is not big enough, the water will go to the shorter route first, which depending on the configuration may be the tap or the shower.
At my old man home, we are in the former case, which lean he often used what this comic shows to make sure we finish our shower if it gets too long to his liking (he is an asshole sometimes 😂).
Meanwhile, at my current home, the boiler is just next to the shower, so the shower takes priority.
The biggest difference with electricity though, is that you can put far more electricity than the wiring is made for, which can cause fires, which you cannot with water. 😅
I’m not a plumbing expert (I got an electronic degree before going for CS), but I can extrapolate from my own experience.
If it does like electricity, it comes from how much water the main line can let through. If it is sufficiently sized, and can accept enough water for both your tap and shower, all you’ll see is a pressure fluctuations (it will be divided per open tap). But if it is not big enough, the water will go to the shorter route first, which depending on the configuration may be the tap or the shower.
At my old man home, we are in the former case, which lean he often used what this comic shows to make sure we finish our shower if it gets too long to his liking (he is an asshole sometimes 😂).
Meanwhile, at my current home, the boiler is just next to the shower, so the shower takes priority.
The biggest difference with electricity though, is that you can put far more electricity than the wiring is made for, which can cause fires, which you cannot with water. 😅