What is a high drain loop?

A high loop is when the dishwasher drain is elevated right before its connection to the kitchen sink drain. The drain hose is secured near the top of the sink in some fashion (could be as easy as using a zip tie to secure it).

Do all dishwashers need a high loop?

For this reason most homeowners opt for the high loop under the counter. Although all new dishwashers come with a high loop integrated into the unit itself, every installation manual I have read requires the high loop be installed under the sink as well. Luckily this is not a hard requirement to satisfy.

How high does a dishwasher high loop need to be?

20 inches
Dishwasher hoses should have a high loop at least 20 inches above the finished floor to prevent wastewater from entering the appliance if the drain clogs. Code requires that the hose connect to the sink drain on the sink side of the trap, typically with a branch tailpiece.

Why is water coming out of my air gap?

When the gap leaks, it is normally due to a kink or blockage in the tube from the air gap to the tail piece (drain line) below the sink. The gap may need to be cleaned, or the drain line below the sink may be plugged.

Does a dishwasher drain hose need a loop?

“A high loop is required on the dishwasher drain in the installation instructions for all of your dishwashers. GE: “If an air gap is not required, the drain hose must have the high loop from the floor to prevent backflow of water into the dishwasher or water siphoning out during operation.”

Does a garbage disposal need an air gap?

When there is a garbage disposal installed, the dishwasher drain line should run down from the air gap or high loop and connect to a side nipple on the disposal, where it connects with a hose clamp. If the hose connects after the P-trap, sewer gasses can flow up into the dishwasher hose and into the dishwasher.

Why does a high loop dishwasher drain?

Bosch: The high loop in the drain hose of your dishwasher is to keep water from settling in the hose if it were hanging down any lower or horizontally. This keeps the drain hose dried out and keeps any odors from backing up into the dishwasher.

Is a high loop as good as an air gap?

The high loop method is not as reliable as an air gap, but it can help to prevent contaminated water from being drawn back into the dishwasher. Where allowed, the high loop method frees up a sink mounting hole that can be used for a soap dispenser, water filtration, or instant hot water dispenser.

Why does dishwasher drain hose need a loop?

What is the purpose of a high loop on a dishwasher?

The purpose of a dishwasher high drain loop is to prevent back flow of water. The water can flow back into the dishwasher which will leave water in the bottom of the dishwasher. The high drain loop is also there to prevent improper drainage of water while the dishwasher is running. The high loop does not prevent siphoning.

How do you drain a dishwasher?

Remove the water with containers and towels. Moving a dishwasher full of water can be messy. Protect the floor under, and in front of, the dishwasher with old towels. Use cups or other containers to scoop out the water and transfer it to the sink drain. Use a couple of towels to soak up the last portion of the water.

How does a dishwasher drain work?

Dishwashers drain by pumping out water through a drain hose. With portable dishwashers, the end of the hose fits inside one of the sink baskets and is removed when the washer is not it use. The hose for a built-in dishwasher is inside the sink cabinet and interfaces with the sink drain.