IIRC a current 40gal water heater has mandated thicker insulation under the metal wrap, so its fatter then a 40gal tank was 20yrs ago. Taller too. I am also fatter then I was 20yrs ago, and most of it is also 'insulation'.
Out of 100s of houses I've worked on, only had 1 faucet w the hot/cold installed backwards, and it was all white PEX, no markings at all. Installer just had to keep track of what was what and stub them out correctly under the appliance: hot left, cold right......
Disconcerting every time you saw a house in rough.
Not to derail, but have you ever seen the PEX banding instead of the metal strap clamps you used? Heat expansion in LasVegas caused problems w alightly misaligned metal PEX clamps. Ater numerous HOAs sued builders for water leaks, the metal rings were prohibited in both Las Vegas and North Las Vegas.
They simply cut a 3/4in long pc of 3/4Pex and used a hydraulic spreader to stretch it slightly, pushed the ring over the end of the Pex, stuck a fitting in, and 5-10sec later the 3/4in collar shrank and made a water tight seal. Tool was expensive but you didnt buy clamps/rings.... or a 1/2in long pc of 1/2Pex. Might have been an older Wirsbo sytem, which now uses a Wirsbo Pex band, not a pc of Pex to make the clamp..
Neat install w all the short pcs and elbows.