Menu
What is an Air Gap, Exactly?
Book Now
Book Now
Plumbing 10/29/14

What is an Air Gap, Exactly?

According to the Wikipedia, an air gap is an “unobstructed vertical space between the water outlet and the flood level of a fixture.” What does that even mean? And, did you know that having an air gap installed with any dishwasher is now required by Uniform Plumbing Code?

The most common use of the term “air gap” refers to the plumbing fixtures that provide backflow prevention device for your dishwasher. But, what does air gap plumbing do, exactly? A properly maintained and installed air gap prevents drain water backing up into the dishwashing machine and the result of possible contamination.

The plumbing code in San Diego requires all dishwashers be installed with an air gap because of the possible contamination factor. Although it is a small chance, the possibility for dirty water to be siphoned into the dishwasher drain line and then into the main water supply line is still a possibility and an air gap will prevent this. Some people might advise that you can go with a “High Loop” method of bringing the dishwasher drain up to the highest point under the sink before connecting to the sink drain. However, in San Diego, plumbers (licensed and by the book) and appliance installation crews will not install or hook up a dishwasher using this method, nor will it pass inspection from the city. It is best to follow all safety codes.

Air Gap-01

The air gap is the cylinder-like vent fixture located next to the sink faucet that permits air admittance to the drain piping and plumbing system below the sink and countertop. The drain pipe, or drain hose, of the dishwasher feeds to the top of the air gap, and the bottom of the air gap is plumbed into the sink drain below the basket trap or into the garbage disposal. If at any time, water flows from the plumbing systems fixture into the sink, the pipe and plumbing may be backed up and clogged, and it might be time to call out your local San Diego plumbers for maintenance or repair of your backflow preventer.

If you are thinking about installing a new dishwasher, and do not have an air gap, or are having issues with your current dishwashing setup, call Bill Howe Plumbing in San Diego for a free estimate. You’ll save time and be fully prepared when your new dishwasher arrives! Call 1-800 Bill Howe (245-5469).

Comments

Leave a Reply

Related Posts

Plumbing

Signs of a Gas Leak

Natural gas is used in homes and businesses for various heating needs. When properly installed and maintained, natural gas is a reliable and safe utility. However, everyday wear-and-tear or improper use of gas appliances...

11 months ago Share Icon
Read More
Guide to Disinfectant Fogging
Blog

A Guide To Disinfectant Fogging

Introduction In recent years, the standard of personal hygiene and sanitation has been raised. High traffic areas with objects touched by different people require more attention, which has increased the need for cleaner surfaces...

11 months ago Share Icon
Read More
Blog

COVID19 – Our Dedication To Your Safety

The Coronavirus is still active in San Diego and the Bill Howe Family of Companies is doing everything we can to prevent the spread while taking care of our customers’ needs. We continue to...

12 months ago Share Icon
Read More

What David says about us

Service for new garbage disposal. My ancient garbage disposal quit working, went online to get Bill Howe’s number, immediately received and accepted chat to describe my needs. Prompt call back to schedule an appointment, service tech Allen was out same morning, which was important to fit my work schedule. Job estimate was clear, work done fully to my expectations, area left clean, and price was very fair.
I was not surprised — I have used Bill Howe plumbers for several other tasks in the past. I have always found their staff to be helpful, attentive, and the plumbers very courteous and capable.

January 2020

Plumbing

What Michelle says about us

I have been using Bill Howe since the late 1980’s, their service has always been excellent, plumbing, heating and restoration. I am most impressed by the integrity of their employees, not only do they know their work/skill, they do not waste time, they are so efficient, they are so helpful and they are a true “service”!

February 2020

Plumbing

What Mira says about us

Bill Howe never fails us! We had a drain overflow, and Scott came (on a Saturday) to look at it and offer solution. He was punctual, professional, and extremely helpful. I should also praise the main office for always being helpful and always finding solutions. Very grateful to have you in San Diego!

February 2020

Restoration & Flood

What Ed Gohlich says about us

Cory was our technician on this job. We had a time sensitive repair issue and Bill Howe understood and assisted with getting the job done quickly.
Cory was on time to start the job and finished it quickly. Upon his leaving our home he’s was courteous, very knowledgeable, explaining what the problem was and how he fixed it. Very good communication and this is the way it’s has always been when we use Bill Howe plumbing.
Great company to work with.
Thanks Cory.
Ed

August 2019

Heating & Cooling

What Eric says about us

I had a shower that would not drain. The employee arrived on time and fixed the problem quickly and effectively at a very fair price. I was very happy with everything. Thank you and I highly recommend your plumbing service.

January 2019

Plumbing

What Bridgett says about us

I am extremely happy with the service we received from Bill Howe Plumbing. We were given an incorrect diagnosis of our main sewer line from another vendor, but Bill Howe’s servicemen came out for a second opinion, correctly diagnosed our problem and resolved our back up issues. We will continue to use Bill Howe for all our future plumbing needs!

Thank you Bill Howe Plumbing.

July 2019

Plumbing