I have some decent ideas as to why, I’m asking mainly as a hopefully fun contribution here, and to maybe learn some interesting plumbing info!
I have some decent ideas as to why, I’m asking mainly as a hopefully fun contribution here, and to maybe learn some interesting plumbing info!
While I’m not a plumber there is something to consider as well.
Water hammering
I think this is why something like Pex works well since it’s flexible while not being so flexible that you’d have to worry about long term abrasion and wearing away from a hose bouncing back and forth from it.
But water hammer is an understood, fixable problem. It’s mostly that modern appliances have solenoid valves that switch too quickly for older piping found main most peoples homes. Even then, a water hammer arrestor will usually cover it
Pex is also resistant to bursting in the event of freezing. I used pex in my van build and the few times the pipes have frozen haven’t resulted in any issues other than having to wait for the pipes to thaw.