A ball valve is a shutoff valve that controls water or gas flow using a rotating ball with a hole through it. When the handle aligns with the pipe, flow is open; when turned 90 degrees, flow stops. Ball valves are durable, seal tightly, and operate quickly, making them ideal for main water shutoffs and water heater isolation.
/bɔːl vælv/
A ball valve is a shutoff valve that controls water or gas flow using a rotating ball with a hole through it. When the handle aligns with the pipe, flow is open; when turned 90 degrees, flow stops. Ball valves are durable, seal tightly, and operate quickly, making them ideal for main water shutoffs and water heater isolation.
How does a ball valve work?
A ball with a hole rotates inside the valve. Aligned with the pipe it lets flow through; turned 90 degrees it stops flow.
Source: The Cooling Company
Quarter-turn handles provide fast, reliable shutoff.
Homeowners and plumbers use ball valves to isolate water heaters for maintenance or emergencies, allowing fast shutoff without draining the entire system.
Operate ball valves periodically to prevent seizing and keep the shutoff smooth in an emergency.
“Operate ball valves periodically to prevent seizing and keep the shutoff smooth in an emergency.”
Ball valves are used in everything from home plumbing to industrial systems because of their reliability and tight seal.
Can a ball valve be partially open?
It can, but ball valves are designed for fully open or fully closed positions. Partially open can wear the seals over time.
How do I know if a ball valve is closed?
The handle is perpendicular to the pipe when closed and parallel when open.
Do ball valves need maintenance?
They are low maintenance, but operating them periodically helps prevent seizing and ensures a reliable shutoff.
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