A _______________ is a valve design that utilizes a rubber washer to stop the flow of water and is a directional flow isolation valve.
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Q13: Codes typically allow the water service piping
Q14: A backflow-prevention device known as a _
Q15: A _ valve utilizes a metal gate
Q16: What is the purpose of an isolation
Q17: What is the purpose of pipe insulation?
Q19: The most common classifications of residential valves
Q20: All hose bibbs are protected with a
Q21: What is the purpose of a relief
Q22: What is the purpose of a hose
Q23: Name the common isolation valves used for
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