While you wait: find your main shutoff
- Under the kitchen sink, at the back. That's where it is in about seven houses out of ten.
- Failing that: downstairs loo, under the stairs, or in the garage near where the main enters.
- Turn it clockwise until it stops. If it's stiff, use both hands slowly, and do not force it.
- Open the cold kitchen faucet to drain what's left in the pipes above.