I've recently noticed a regular dripping sound coming from somewhere near the pipes the supply my washing machine.
In that picture, the sound seems to be coming from behind the faucet on the left. The sound is about once every 2 seconds, and is somewhat lower pitched, a little like knocking, but still seems to be some kind of dripping.
Above the faucet, there's a fixture that seems to be leaking, but much more slowly; e.g. a drip of water forms and falls maybe once every 20 minutes or so, and it results in part of the central drain hose below being wet:
Note that this leak is extremely small and slow (and seems separate from the dripping sound every two seconds which appears to be coming from inside the pipes), so beyond the slightly wet outer surface of the black hose (since the hose just happens to lie right below that extremely slowly leaking fixture, there's doesn't seem to be any other puddles on the ground. The fixture seems to be connected to the pipes behind the faucet: when I push the fixture gently; pipes seem to move a little.
I'm locating on the east coast, in New Jersey. The last time I used my washing machine was yesterday, but the sound has been around for at least 4-5 days.
Any suggestions on how I should proceed?