Air gap or high loop

[Bob Elliott]

Here is the language I am presently using .

• The dishwasher needs to have the hose mounted above the basin in
order to help prevent water from backing up into the container
• . Air gaps are now standard equipment to assure a separation between
supply and waste water. It is advised that either an air gap or a high loop
be installed between the dishwasher and the waste connection.

Many of my comments are hybrids of everything I have learned right here over the past several years. (my how time fly's)

[sparksnmore]

I can only remember seeing maybe three or four air gaps in both Johnson County KS and KCMO in the last 40 years Buck.
Fixed a lot of dish washer drains that didn't have a high loop either.

[Bob Elliott]

Originally Posted by sparksnmore

I can only remember seeing maybe three or four air gaps in both Johnson County KS and KCMO in the last 40 years Buck.
Fixed a lot of dish washer drains that didn't have a high loop either.

Glad you fixed them

[Paul Pendley]

Originally Posted by jpope

Manufacturers instructions take precedence over code except when there is a "prohibition" in the code.

CA is very specific. If it's connected to a disposer, it must have an air-gap.

CPC 807.4 No domestic dishwashing machine shall be directly connected to a drainage system or food waste disposer without the use of an approved dishwasher airgap fitting on the discharge side of the dishwashing machine. Listed airgaps shall be installed with the flood level (FL) marking at or above the flood level of the sink or drainboard, whichever is higher.

Ditto....CA

[Rick K. Kie]

I call out the need for a High Loop also. And yes most newer style ones have built in High loops if they didn't rework the hose. I still call them out.

[Marcel R. Cyr]

Interesting read on a Plumbers Forum on the subject.

http://www.plbg.com/forum/read.php?1,176325

[Bob Elliott]

Originally Posted by mcyr

Interesting read on a Plumbers Forum on the subject.

http://www.plbg.com/forum/read.php?1,176325

Good argument for air gaps Marcel.
I do see them as in yesterdays job, but not often enough that I think many care.

Might as well yell into the wind .

It is code in Chicago, but never enforced apparently.

[Brian E. Kelly]

Originally Posted by belliott

Good argument for air gaps Marcel.
I do see them as in yesterdays job, but not often enough that I think many care.

Might as well yell into the wind .

It is code in Chicago, but never enforced apparently.

There was not a good argument at all for an air gap, just an argument.

This quoted post sums is up quite nicely.

Author: HytechPlumber
An air gap on a dishwasher drain only reduces the amount of dirty water that may back up into a potable water system. If 100% protection were required than a vac breaker would be installed on the water feed to the dishwasher and just use the inverted loop for the drain. Think about it. GOOD LUCK

[Bob Elliott]

Brian reading only the parts that support you does not count.

"A high loop doesn't do much to protect us from syphoning. "

That is the reason for air gap requirement.

Bacterial infection is not fun.
Spent 5 days in a hospital with it, from a restaurant once.