Because sometimes you want full cold, sometimes you want full hot. Yes you could use a three way valve but you’d generally lose maximum water pressure.
I don’t understand how what you’re suggesting could work any differently than a standard mixer tap, where if you want full cold you turn it the way to cold, and pull all the way to fully open. You say “you’d generally lose maximum water pressure” - how does the mechanism you’re thinking of actually set the ratio of hot to cold, and how does it not lose pressure?
they set the relative flow/pressure of respectively hot and cold water. The tap sets the total flow from minimum to maximum available based on the pressure supplied from.thenother two, allowing the selected hot/cold ratio to be preserved between on/off cycle, while also allowing for just a small stream of water when you need it, or a full flow of water when you need to fill a vessel or blast a dish.
Why would you need separate hot and cold knobs if all that matters is the ratio between them?
Because sometimes you want full cold, sometimes you want full hot. Yes you could use a three way valve but you’d generally lose maximum water pressure.
I don’t understand how what you’re suggesting could work any differently than a standard mixer tap, where if you want full cold you turn it the way to cold, and pull all the way to fully open. You say “you’d generally lose maximum water pressure” - how does the mechanism you’re thinking of actually set the ratio of hot to cold, and how does it not lose pressure?
I’m so confused. What do the cold and hot knows even do?
they set the relative flow/pressure of respectively hot and cold water. The tap sets the total flow from minimum to maximum available based on the pressure supplied from.thenother two, allowing the selected hot/cold ratio to be preserved between on/off cycle, while also allowing for just a small stream of water when you need it, or a full flow of water when you need to fill a vessel or blast a dish.