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Re: air gap in newer dishwashers
"Even if your code *requires* an air gap device, your code also likely says that all appliances must be installed according to the manufacturer's installation instructions, and if those specify a 'high loop', or, an 'air gap *or* a high loop', then no air gap is needed."
Trouble is that most manufacturer's instructions also have CYA wording like in the Bosch diagram below. Air-gaps are by far the norm around here. In fact, I can't remember the last newish home without one. But...as I very much doubt the laws of physics are any different here than other parts of the country, I'm quite comfortable with a high-loop instead on older homes or remodels.
Miele is the only brand I've found so far that actually documents a check valve and doesn't require either but I'm aware that some other newer models can have the high loop attached to the back of the unit. Wouldn't it would be nice for us 'spectors if they would stick a little diagram or label on the front somewhere?
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