@milestoneinspection: I was getting comments that the air gap was an air admittance valve in my last video. Here’s a little breakdown explaining the air gap 🚰 📱 Call or Text (410) 236-7537 📧 [email protected] 💻 www.milestoneinspects.com 📍 Harford County, MD #HarfordCountyMD #plumbing #Homelnspection #RealEstateInspection #certifiedhomelnspector