We have a few water leaks, (plumbing), and rather that repair them we decided to replace the lines with PEX
.(Yes the PO's or the PPO's let the system freeze. The pipes expanded until they burst) It appears that the supply to the water heater as well as the cold
supply to the faucets is 1/2". The hot
appears to be the 3/8". I am considering using 5/8 for the supply, with 3/8" taps for the faucets and 1/2 for the hot
with 3/8 taps for the faucets.
The service manual is vague on this info.
Ideas greatly appreciated