Question

which of the following statements about water heater discharge tubes for temperature/pressure relief valves is not true?
o the tubes cannot be plastic
o the tubes cannot have any shutoff valves
o the tubes have to end roughly 6 inches above the floor indoors, or outdoors 6 to 24 inches above grade
o the diameter of the tube has to be at least the diameter of the relief valve discharge opening
o the tube cannot have threads or fittings or caps on the end

question 2
all gas meters should be preceded by a
o bypass connection
o shut - off valve
o drip leg
o xx connection
o plastic fitting

Explanation:

1. For the first question about water - heater discharge tubes:

• Plastic can be used for some water - heater discharge tubes in certain cases. So the statement "the tubes cannot be plastic" is not true.
• Discharge tubes should not have shut - off valves to ensure proper relief.
• They should end at the specified heights indoors and outdoors for safety.
• The diameter should be at least as large as the relief valve discharge opening for proper flow.
• The end should be free of threads, fittings, or caps to prevent blockage.

1. For the second question about gas meters:

• A shut - off valve should precede a gas meter to be able to cut off the gas supply for maintenance, safety, etc. A bypass connection is not a requirement before all gas meters. A drip leg is used to collect condensate and is not always the component preceding the meter. "XX connection" is not a standard component before gas meters and plastic fittings are not typically used as the component preceding gas meters for safety reasons related to gas.

Answer:

Question 1: the tubes cannot be plastic
Question 2: shut - off valve