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Why is it not code to run the dishwasher standpipe at least half way up the sink basin? I see so much property ruined by not doing so. You don't know there's a problem until your feet are wet or the ceiling below starts leaking
You will also see knuckle heads install quick vents below the floor rim of the fixture. When the drains backs up instead of staying in the sink many times it floods through the quick vent and the same thing occurs. I
Please correct me but here this would be a total fail. Standpipe is wrong but so too is the insinkerator. Look messy and hackish. Then again as Tony will attest to as well, we seethis sort of thing fairly regularly because we just dont have good teachers in our schoolsteaching the boys like we were taught
1 trap with a 2 compartment waste and a diverter tee.
In theory, the disposal running with a load of water can siphon out the trap of the second compartment.
An air gap is required in the majority of dishwashers. Except the very expensive european models. A high loop is not going to protect the potable water like an air gap will. A standpipe below the level of the sink overflow is asking for a flood when the downstream line stops up on the sink. Every garabge disposal except commercial units have a 7/8'' knock out for a reason.