We had a faucet emergency, that ended up shutting our house water off. We were going to install a faucet ourselves, but the very old water supply valve below the sink broke. We were unable to get the first few plumbers we called, but we managed to get a visit from Jack Dish Plumbing, even though it was a weekend.
The service was fast and efficient, and the charge was reasonable ($205 which included the valve-- we supplied the faucet), and there was no extra charge for the weekend.