【Daily Question】Utilities - Water Supply and Drainage - 20200206
Thread Content
When the vertical distance between the connection point of the drainage branch pipe near the bottom of the drain riser and the bottom of the riser does not meet the specifications, separate drainage is required; otherwise, water will leak from the trap, and this is caused by ( ). A. Excessive positive pressure at the start of the horizontal main pipe B. Excessive negative pressure at the start of the horizontal main pipe C. Alternating positive and negative pressures at the start of the horizontal main pipe D. Blockage in the vertical branch pipes Answer: A
A. Excessive positive pressure at the start of the horizontal main pipe
A. Excessive positive pressure at the start of the horizontal main pipe