The trap seal keeps sewer gases in the drainage system and prevents them from entering the building.
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Q4: The principal function of the vent system
Q5: The _ is the water in the
Q6: Cast iron vent pipe run horizontally must
Q7: Plastic vent pipe run vertically must be
Q8: Vent terminals above the roof may be
Q10: In general, piping materials suitable for drainage
Q11: Yoke vents can be used on only
Q12: Horizontal runs of copper tubing should be
Q13: All horizontal vent piping should be installed
Q14: To prevent siphoning, trap arms should be
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