Sounds like this come from everyday field recordings of a tap at a hand wash basin, made to capture real plumbing and water noise rather than a studio effect. Short sink and faucet clips became common on soundboards because they fill a practical gap in video editing, where a bathroom action is shown but the original audio is missing or too quiet. The washing hands version is now reused for hygiene reminders, cleaning content, ASMR edits and comedy cutaways where the act itself is the punchline or reset.