Yeh that's brutal. Bad plumbing going on there. Major pressure drop. I'm betting they shared a 1/2" line off one of the fixtures below. Code failure. Should be a 3/4 supply tee's to half.I you touch the hot water in my house whenever someone is in the shower they will freeze. If you touch the cold they will be scalded.
And it’s even worse because we share the water system with our downstairs neighbours so it’s always a gamble.
I have actually some decent anxiety over it.
I think, if I remember correctly, 3/4" is 75% more.volime than 1/2.
