On Mon, 10 Jul 2017 01:37:44 GMT, Wayne Boatwright
wrote:

On Sun 09 Jul 2017 05:32:51p, Ed Pawlowski told us...

On 7/9/2017 5:49 PM, Stormin' Norman wrote:

I am not sure if plumbing code in all states require an air gap
as part of the dishwasher installation. For more information,
see:

https://www.thespruce.com/dishwasher-venting-2718654


Air gaps are not required in AZ unless in certain commercial
buildings and high rise apartment buildings.

That is interesting Wayne, thanks. If it were me and if I had an
extra punch-out in the sink, I think I would install one
regardless.


I wouldn't, just a loop. Had dishwashers for 50 years and no
problems without it. Anyone know of a problem actually caused by
a DW that back siphoned into the water system? Yes, it can get
into the DW, but the purpose of the air gap is to protect the
domestic water supply.


Never had a problem with a loop, and only lived in one place that had
an air gap.

I'd be guessing, but single kitchen sinks have just a loop mounted
high under the cabinet. Double sinks have a sink mounted air gap.

I forgot to remove the "plug" in a new GD install. The dishwasher
flushed out the sink mounted air gap. (knock the plug out )