dishwashers in some areas\nrequire an air gap fitting\nmust drain directly into a stack\ncannot drain into a…

dishwashers in some areas\nrequire an air gap fitting\nmust drain directly into a stack\ncannot drain into a waste disposal\ncannot discharge into a tailpiece of a sink\nmust discharge into a trap arm upstream of the vent\nquestion 44\nhorizontal cast iron piping is prone to\nsplits on the top\nnoise transmission\nsags when supported at 3 foot intervals\ncombustibility\nrusting after 15 years

dishwashers in some areas\nrequire an air gap fitting\nmust drain directly into a stack\ncannot drain into a waste disposal\ncannot discharge into a tailpiece of a sink\nmust discharge into a trap arm upstream of the vent\nquestion 44\nhorizontal cast iron piping is prone to\nsplits on the top\nnoise transmission\nsags when supported at 3 foot intervals\ncombustibility\nrusting after 15 years

Answer

Brief Explanations:

In many plumbing - code areas, dishwashers require an air - gap fitting to prevent back - siphonage of contaminated water into the potable water supply. Horizontal cast - iron piping is known for its high sound - transmission properties due to its density and rigidity.

Answer:

  1. require an air gap fitting
  2. noise transmission