What is an angle stop?

An angle stop, also known as an angle valve or stop valve, is a plumbing fixture that controls the flow of water or gas in a plumbing system. It is typically used to shut off the water supply to a specific fixture or appliance, such as a sink, toilet, or washing machine.

Angle stops are typically located at the point where the water supply line connects to the plumbing fixture. They have a handle or lever that can be manually turned to open or close the valve, allowing the user to control the flow of water.

Angle stops are available in different materials, such as brass, chrome-plated brass, or plastic. Brass angle stops are commonly used due to their durability and resistance to corrosion.

These valves come in two main types: compression angle stops and quarter-turn angle stops. Compression angle stops require a threaded nut and ferrule to attach the water supply line, and they are tightened using a wrench. Quarter-turn angle stops, also known as ball valves, have a lever or handle that only needs to be turned a quarter of a rotation to open or close the valve. They are generally easier to operate and provide a more reliable shut-off.

Angle stops are essential for emergency shut-off in case of leaks or repairs, allowing the user to isolate the water supply to the affected fixture without disrupting the entire plumbing system. They are also used during installation or replacement of fixtures and appliances to control the water flow.

Regular maintenance and occasional replacement of angle stops are necessary to ensure proper function and prevent leaks. If an angle stop is old or starts to show signs of wear, it is recommended to replace it with a new one to avoid potential plumbing issues.