top of page
  • Writer's picturenorthwayhomeinspec

What is a Dishwasher high loop?



A high loop in a dishwasher installation is a method used to prevent backflow of dirty water into the dishwasher. It's a crucial step in the installation process, ensuring the proper functioning of the appliance and maintaining hygiene. Your high loop on the dishwasher should look like an upside down P trap.  And it’s a very common defect found during the home inspection. It can also easily be fixed and wont break the piggy bank..

Purpose:

The high loop prevents wastewater from siphoning back into the dishwasher from the sink or garbage disposal. This helps avoid contamination and keeps the dishwasher clean.

Do I need a high loop:

Yes, you do… end of story. It is required by plumbing code, and is also a good idea for you to not have wastewater siphoning in your dishwasher.

Additional Tips:

  • Proper Positioning: Ensure the loop is high enough to prevent backflow. The loop should be as high as the countertop.

  • Check Local Codes: Some areas may have specific plumbing codes that dictate the installation height and method.

  • Air Gap Installation: In some regions, an air gap may be required by code instead of or in addition to the high loop. An air gap provides a visible gap to prevent backflow and is installed on the sink or countertop. MN does not require an air gap anymore.

  • High loop on dishwasher: most dishwashers already have a high loop on the side of the dishwasher or built in it, but you still need to have a high loop before the plumbing enters the waste line.



Pic below= no high loop.


8 views0 comments

Comments


bottom of page