What Is An Angle Stop?
An Angle Stop is a small shutoff valve that controls water flow from a supply pipe to a fixture. It usually sits where the pipe leaves the wall and turns toward a toilet, sink, or other fixture. Closing the valve stops water at that fixture without shutting off the whole building.
Quick Facts About Angle Stop
Category
Fixture shutoff valve
Used for
Isolating toilet and sink water supplies
Common confusion
Often confused with the main water shutoff
Also called
Angle Stop Valve, Compression Stop
Often discussed with
Toilet Repair
Key Takeaways About Angle Stop
- The valve changes direction from the wall pipe to the fixture supply line.
- Closing it isolates one fixture during repairs or leaks.
- An Angle Stop is not the same as a whole-house shutoff valve.
How Angle Stop Works
Angle Stop controls the supply line between a building pipe and a fixture. Its body turns the water path, often from a wall connection toward a toilet tank or faucet. The handle opens or closes an internal passage.
Related glossary terms: Shutoff Valve, Compression Fitting, Fill Valve.
A closed valve blocks water before it reaches the fixture. A plumber may close it before replacing a supply line, fill valve, or toilet. The connection may use a compression fitting, threaded connection, or another approved attachment method. The valve must match the pipe and supply line so the joint stays secure.
Expert Note
When we inspect an Angle Stop, we check the valve body, handle, supply connection, and nearby pipe. We also test whether the valve closes fully without forcing it. On toilet repairs, we look for corrosion or a slow leak that could affect the new part.
Angle Stop in Practice: A Real-World Example
A toilet keeps running, so the water supply needs to be isolated before the fill valve is replaced. The Angle Stop under the toilet closes the local supply, while other fixtures can still receive water.
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Related Terms
Shutoff Valve
A Shutoff Valve is a plumbing control that stops or allows water flow through a pipe…
Compression Fitting
Compression Fitting is a removable plumbing connector that joins pipes or tubing without soldering, glue, or…
Fill Valve
A Fill Valve is a toilet tank component that opens to let fresh water enter after…
Toilet Wax Ring
A Toilet Wax Ring is a flexible sealing gasket that sits between a toilet base and…
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