How to shut off angle stop, which is small shutoff valve under sink or behind toilet that controls water to individual fixture, is straightforward process that every homeowner should know for emergencies and maintenance. First, locate angle stop, it is usually oval or lever handled valve on wall or floor behind toilet or under sink, with supply line going to faucet or toilet. For modern quarter turn ball type angle stop with lever handle, turn handle 90 degrees clockwise until it is perpendicular to pipe, lever across pipe means closed, parallel means open. For older multi turn angle stop with oval or round handle, turn handle clockwise, to right, several turns until it stops, do not over tighten excessively, turn until snug. After shutting off, test that it worked by turning on faucet or flushing toilet, water should stop or slow to trickle then stop after pressure releases. If valve is stiff, use pliers with cloth to protect finish, or spray penetrating oil and wait. If valve leaks or does not fully shut off, it may be bad and need replacement. For toilet angle stop, you may need to hold tank lever to drain. Knowing how to shut off angle stop allows you to fix faucet or toilet without shutting off whole house water.
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