Yeah, those backups are no joke—seen one too many spaghetti noodle clogs myself. Curious, has anyone ever tried one of those high-loop setups under the sink instead of a full air gap or separate line? Wondering if that’s a decent middle ground or just asking for trouble...
High-Loop Setup: Worth the Risk or Just a Shortcut?
I’ve actually run into a few high-loop setups while helping out on jobs, and honestly, they seem to work fine most of the time… until they don’t. One kitchen I worked in had a high loop instead of an air gap, and it was fine for years, but then a nasty backup happened and the dishwasher filled with gross sink water. The homeowner was not thrilled, to say the least.
I get why people go for the high loop—it’s way easier and looks cleaner under the sink. But I’ve heard some inspectors don’t like it, depending on where you live. Anyone ever have issues with local code on that? Or maybe there’s a trick to making high loops more reliable? I’m still learning the ropes, so I’m curious if there’s a “best practice” or if it’s just one of those things where you roll the dice and hope for the best.
One kitchen I worked in had a high loop instead of an air gap, and it was fine for years, but then a nasty backup happened and the dishwasher filled with gross sink water.
Had almost the same thing happen in one of my rentals. Looked tidy, worked fine—until a tenant called about standing water in the dishwasher. Ended up switching to a dedicated drain line after that. High loops are tempting, but I’ve found local inspectors here always want an air gap or direct drain. Not worth risking a call-back or water damage for the sake of a cleaner look under the sink.
Ran into this exact issue when I was trying to save a few bucks on my last kitchen update. High loop seemed fine, but after a year or two, gross water backed up into the dishwasher and it was a pain to clean out. Ended up spending more fixing it than if I'd just done the air gap in the first place. Cleaner look under the sink is nice, but honestly, peace of mind is worth more to me now.
Seen this play out more than once—folks think the high loop is “good enough” and then call me when the dishwasher smells like a swamp. Air gap might not look as tidy, but it’s code for a reason. I’d rather deal with a clunky fitting than a backed-up dishwasher any day.