Hot Water faucet groaning

If it's an aftermarket faucet, note that some of them come with check valves. Like the $80 kitchen faucet I bought at Walmart. Didn't notice that it wouldn't drain out properly when I winterized and the water left in it froze and broke a pipe on the faucet and caused the house plumbing to burst open too.

So, if it's an aftermarket faucet, check it for a bad check valve at the connection to the house plumbing, and remove them if you winterize. They're not needed in a small RV.