What did the plumber doing repairs at my house mean when he said he had to make a 'high loop' so the new dishwasher would work properly? - Quora
![plumbing - Do dishwashers with a built in "high loop" require a second high loop under the sink? - Home Improvement Stack Exchange plumbing - Do dishwashers with a built in "high loop" require a second high loop under the sink? - Home Improvement Stack Exchange](https://i.stack.imgur.com/UrkFI.png)
plumbing - Do dishwashers with a built in "high loop" require a second high loop under the sink? - Home Improvement Stack Exchange
![Is this dishwasher drain's high loop steep enough..I know the line jots upward a little towards the end, but I can't imagine this to cause backflow to appliance...does that seem correct/OK? : Is this dishwasher drain's high loop steep enough..I know the line jots upward a little towards the end, but I can't imagine this to cause backflow to appliance...does that seem correct/OK? :](https://preview.redd.it/9iwcl7wxs21y.jpg?auto=webp&s=99998607464e2614424409e886ac542a012f6fd2)