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Interior Shut Off Valves

There are two main types of water shut off valves:



 Gate Valves Ball Valves
        
Gate valves are more common in older homes (circa 1970s and older), while ball valves are the standard for newer homes.  
Ball valves have a small ball inside with a hole through the middle, which rotates by 90 degrees to open and close the water when the handle is used.  
A gate valve controls the flow of water with a metal gate inside that raises and lowers when the handle is turned.

For information on other valves available follow the links below: