We just bought an old house (1890) a few months back.
I have noticed that randomly the bathroom sink faucet and bath tub faucet will drip (never at the same time).
Also, I have noticed our toilet or toilet plumbing makes kind of a constant noise every minute or so, kind of like air is in the pipe or some sort of moving water sound.
The toilet functions fine and the toilet water source does not "run" after flushing.
Are these things connected (the toilet noise and the leaky sink faucet/bathtub faucet) ??