The Importance of Air Gaps in Providing Safe Food to All
Late last month, I was exploring job tasks that are important for entry-level foodservice managers to understand related to food safety. The usual items that you would suspect were on the list were certainly included – foodborne outbreaks; temperature danger zone; physical, biological, and chemical contamination; personal hygiene and proper glove use; HACCP systems, etc. But one thing I noticed was missing that really is integral to protecting the food supply in any foodservice operation is air gaps.
I thought back to when I was starting my management career in foodservice, and I know I was certainly aware of what an air gap was, but looking back now, I certainly took them for granted. After all, I was managing a foodservice operation that had been opened since the 1960s. Certainly, all the plumbing had air gaps in place, and it wasn’t something that I had to worry about – or so I thought.
There have been instances where a lack of air gaps did cause illness – and most have been in established operations. For example, a few years ago, a popular quick service Mexican restaurant in California caused over 100 customers to contract Norovirus. Upon investigation, the health found that contaminated water from a sink that lacked proper air gaps had likely caused the outbreak.
Air gaps may be a dry subject to discuss and learn about, but they are a critical component of food safety…
If you are not quite familiar with what an air gap is, it is a vertical space between the water outlet and the flood level rim of a sink or other plumbing fixture. Essentially, a physical separation between potentially contaminated water and the source of fresh water. It is designed to prevent any backflow of contaminated water into the freshwater supply. This is especially important in areas where food is prepared, cooked, or served and plays an important role in preventing the spread of harmful bacteria, viruses, and other pathogens that can cause foodborne illness.
Why are air gaps so vital to protecting public health? When water pressure drops in a plumbing system, a vacuum can form, causing water to flow backward and potentially contaminate the freshwater supply. An air gap prevents this from happening by creating a physical barrier between the water source and the potentially contaminated water. Without an air gap, contaminated water can easily flow the water supply, ultimately contaminating food and causing illness.
It is important to note that air gaps must be properly installed. But they must also be properly maintained to be effective. Regular inspections and maintenance are critical to ensuring that air gaps are functioning properly and protecting against cross-contamination. I was reminded of this last week as I was drawing water for a mop bucket in our foodservice lab at the university – and I caught myself filling the bucket with the hose in the mop water, failing to keep the air gap that is needed to protect the water supply. What is the solution? Cutting the hose, making sure to keep it long enough to be able to effectively fill the mop bucket, but short enough that an employee (or in this case, me!) cannot stick the hose in the mop bucket.
Air gaps may be a dry subject to discuss and learn about, but they are a critical component of food safety in any foodservice operation. Following best practices for air gap installation and maintenance will help any foodservice operator protect their customers and ensure the safety of the food they serve. Risk Nothing.
Was that last 24 Hour “Bug” You Had Really a Foodborne Illness in Disguise?
Within this blog, I have discussed many foodborne pathogens: E. coli, Hepatitis, Salmonella, Listeria monocytogenes, and Campylobacter. But we’ve somehow managed to omit Staphylococcus aureus (S. aureus).
30 Years Later: The Foodborne Illness Outbreak that Changed Food Safety
In January, we hit a major anniversary. One I am betting snuck by many of you – including me! January marked 30 years since the deadly 1993 E. coli O157:H7 outbreak at Jack in the Box restaurants on the west coast. The anniversary wasn’t on any of the major news networks that I recall. It did make it into a few newspapers, at least one or two of the newspapers that are left. It wasn’t until late-February that I realized it.
Does Temperature Really Matter when Washing your Hands?
In January, I reviewed the changes to the 2022 Food Code in my blog (check out Part I and Part II), and one change to the food code that I had mentioned, but didn’t discuss in-depth, was the change that lowered the water temperature a hand sink was required to produce to 85°F, as noted in Section 2-202.12 of the code. This requirement has been in place since the publishing of the 2001 Food Code, which required a water temperature of 100°F. Prior to this, 110°F was required (see the 1999 Food Code). So why the change and does water temperature when washing your hands really matter?
Hand sinks: Often Taken for Granted, but an Essential Part to Effective Hand Hygiene
Late in January, I received a question about hand sinks in a foodservice operation. The question pertained to school staff (teachers and aides) who were using a hand washing sink in the school kitchen. The question came as a matter of who was allowed access to the kitchen to use the sink, but the question itself caused me to go down a rabbit hole of requirements for hand washing sinks in foodservice operations.
