Literally, two guys came to my home and detached my two water lines, tested them for flow, for my bathroom sink, then they took the sink faucet apart to clean out the filter (which I cleaned), put it back together and then they tightened my main supply line faucet as it was dripping (packing in handle needed adjusting). For this I was charged over $160. They do good work but they are over priced for what they do.