What Is a Ball Valve?
A Ball Valve is a shutoff device that controls water flow through a pipe with a round ball inside. The ball has a drilled passage. Turning the handle lines up the passage with the pipe to allow flow, or blocks the passage to stop flow. Ball valves provide quick, direct control on water lines.
Quick Facts About Ball Valve
Category
Water shutoff valve
Used for
Starting and stopping water flow
Common confusion
A check valve controls flow direction
Also called
Ball shutoff valve
Often discussed with
Water Line Repair
Key Takeaways About Ball Valve
- A rotating ball opens or blocks the water passage.
- The handle shows whether the valve is open or closed.
- A ball valve is not the same as a check valve.
How Ball Valve Works
A Ball Valve uses a round ball with a passage through its center. The handle turns the ball inside the valve body. When the passage lines up with the pipe, water can pass. When the solid side faces the pipe, the valve stops flow.
Related glossary terms: Shutoff Valve, Check Valve, Water Pressure.
A ball valve works best as an on-or-off control. It is not meant for fine flow adjustment because partial opening can affect the seal and valve parts. A check valve serves a different purpose. It helps stop water from moving backward through a line.
Plumbers often install ball valves near water line connections, equipment, and branch lines. The handle position gives a quick visual clue about the valve setting. The valve must match the pipe size and connection type for a proper fit.
Expert Note
When we check a ball valve during water line repair, we look for leaks around the stem, body, and pipe connections. We also turn the handle carefully to confirm that the valve opens and closes without binding. Our team checks nearby fittings for movement that could stress the valve.
Ball Valve in Practice: A Real-World Example
A water line repair may require shutting off a ball valve before a damaged section is removed. After the repair, the valve is opened slowly while the connections are checked for leaks.
Related Services
Related Terms
Shutoff Valve
A shutoff valve is a plumbing control that stops water flow through a pipe or fixture…
Check Valve
A check valve is a one-way plumbing device that lets water flow forward and blocks reverse…
Water Pressure
Water pressure is the force that moves water through supply pipes and plumbing fixtures. Pressure helps…
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