Recent Review: The kitchen sink faucet had been dripping. My knee surgery having healed up enough to let me get down to under-sink level, I decided it was time to replace the faulty washer or O-ring in the faucet. When I went to close the shut-off valves, I learned that the cabinet installers didn't think I'd ever have to turn that handle -- the wall of the under-sink module was too close to the valve. I needed to cut a trench for the handle to run through. I got out my toolkit, Dremel-sawed a groove around the area to be dug out, then carefully went after that space with hammer and chisel. Not quite carefully enough, as I learned when the shut-off valve started leaking water. One thing I learned long ago is, when it's time to shut off the house water supply, it's time to call in a professional. That time had arrived, so I shut off the house supply, picked this likely looking plumbing firm from Angie's List, and dialed. This was about 5:00 PM on a Friday, but Kevin Britt came out promptly, tightened down the loosened packing nut in the shut-off valve (so I could turn on the house supply), and quoted me their price to "rebuild the faucet." It seemed pretty pricey for a washer or O-ring, but as long as he was already out here I told him to go ahead. He didn't have the part on hand but would go get it first thing in the morning. That was fine with me, because at least I had water even though that faucet was still drippy. At 7:05 AM the next morning I got a call from their dispatcher that Kevin would be at my door in about half an hour. He was, even though we'd had some icy weather overnight. Kevin went right to work and in less than a half-hour I had a working, non-leaky faucet. Kevin told me they make a point of using manufacturer-made parts (this was a Delta faucet), because they'd had too much experience with failure in off-brand replacements. While I watched him work I got the real lesson -- there's a lot more to a single-handle faucet than a washer or O-ring. I'm so glad I'd not even gotten to the part where you remove the handle to get to the innards. That step alone required a special tool, but then there was the three-step procedure to open up the valve, and the other special tool to remove more than a dozen pieces, some of them pretty small. There's entirely too much technology in a kitchen faucet these days, but Kevin was in command of it.