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Shutoff valve
A shutoff valve lets you stop water flow to a fixture, a room, or the whole house.
Why it matters
When something leaks, a reachable shutoff turns panic into a simple repair.
Where people get this wrong
Older homes can have stuck valves that do not fully close. A main shutoff hidden behind storage is not a real shutoff in an emergency.
Real-world example
A toilet supply line starts spraying at night. If the valve works, you save the floor. If it does not, you start cleaning up water and calling contractors.
Where this hits your build
This comes up during rough-in and final fixture installation. Accessibility for future repairs matters as much as the initial install.
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