Step-by-Step Instructions and Pictures for Types of Plumbing Valves

By the experts at The Family Handyman
Comparing stop, gate and ball valves for use as water-supply shutoff valves. Read an overview of types of plumbing valves.
From The Family Handyman
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Gate Valves
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Gate valves are called "full-flow" valves; there’s a direct unobstructed path for flow right through the middle of the valve. A wedge-shaped brass gate is lowered into a machined slot to close the valve. They should either be completely open or completely closed. Water flowing through a partially open gate valve wears away the metal and causes the valve to fail over time.
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