Kitchen faucet issue - Integrated flex copper supply line

30 psi is 30 psi no matter where it came from. As for volume, the well pump is rated a bit higher, but remember that it is pushing the water about 200 feet vertically and 100 feet horizontally. Both the RV and the house pump cycles during water draw which means both have adequate capacity. I can tell no difference when connected at home using my well or the onboard system.