That loud bang when the washing machine or dishwasher shuts off is called water hammer. It is more than a nuisance — over time it can loosen joints and cause leaks.
What causes it
Water hammer happens when fast-moving water suddenly stops and the momentum slams against a closed valve. Appliances with quick-closing solenoid valves, like washing machines and dishwashers, are the usual triggers in Santa Monica homes.
Why it matters
A single bang here and there is common, but repeated hammering stresses pipes, fittings, and fixture valves. In older Los Angeles County homes with soldered joints, that stress can eventually turn into a leak inside a wall.
The simple fixes
Installing a water hammer arrestor — a small air-filled chamber — near the problem appliance absorbs the shock. Lowering the water pressure at the main regulator also helps if the pressure is running above the safe range.
When the cause is deeper
Loose pipes that are not properly strapped can rattle even without valve issues. A pro can trace the sound, secure the pipe, and add arrestors where they will actually help rather than guessing.
Stop the banging for good
Water hammer usually has a straightforward fix, and it is cheaper than repairing a leak later. Call 888-217-3585 and Santa Monica Home Plumbing Co will match you with a Santa Monica pro who can quiet the pipes for good.
Plumbing in Santa Monica: what to know
In Santa Monica, mineral-rich water varies by region, and older neighborhoods still run on aging galvanized or copper lines. Pros in our network know the local quirks and bring the right parts on the first visit.
Across Los Angeles County — from Los Angeles, Culver City and Beverly Hills to ZIP codes like 90401, 90403, 90405 — homeowners deal with the same kinds of issues. The tips above apply locally, and when a job goes beyond a quick fix, a vetted local pro is only a call away.
Need a hand in Santa Monica?
If a plumbing issue is beyond a quick fix, don't wait for it to get worse. Call 888-217-3585 and Santa Monica Home Plumbing Co will match you with a vetted local pro — usually within minutes. Learn more about plumbing help in Santa Monica.