Gas pipe sizing, venting, water heater types, safety devices and installation rules.
39 cards · basic cards · AI-written, checked twice. Edit anything.
- What materials are approved for natural gas piping installations?
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CSST, copper, black iron pipe, and PVC for outdoor use only- What is the maximum spacing between supports for 1/2 inch diameter gas piping?
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6 feet- What does CSST stand for?
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Corrugated Stainless Steel Tubing- What is the typical supply pressure for natural gas to residential appliances?
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0.5 psi or less- What minimum test pressure and duration must gas piping withstand?
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1.5 times the maximum operating pressure (minimum 1.5 psi) for at least 10 minutes- Can rigid copper gas tubing be field-bent during installation?
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No, all bends must be manufactured before installation- What does a pressure regulator do in a gas piping system?
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Reduces high-pressure supply gas to the lower pressure required by appliances- What clearance from combustibles is required around a gas water heater?
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3 to 6 inches, depending on appliance specifications and local code- What is natural draft venting?
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Venting that relies on the buoyancy of hot exhaust gases to rise and exit without mechanical assistance- What is power vent venting?
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Venting that uses an electric fan to force exhaust gases up and out through the vent- What is the minimum slope for a natural draft water heater vent?
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1/4 inch rise per 12 inches of horizontal run- Can a water heater vent diameter decrease as it rises?
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No, the vent must maintain the same size or increase, never decrease- Where must a water heater vent terminate?
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Above the roof line or through an exterior wall, with clearance from windows and doors- What is a tankless water heater?
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An on-demand water heater that heats water as it flows through, without storing heated water- What are the main advantages of tankless water heaters?
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Higher energy efficiency, unlimited hot water supply, and compact size
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