Backflow prevention systems overwhelmed in basements #flood #disaster #survival #science #weather

GBG Inspection on Instagram: "We have some freezing weather coming again, if you haven't done so already now is the time to be prepared and winterize the sprinkler system. Many residential sprinkler systems are tied into the home’s main water supply without a proper backflow prevention device. During a pressure drop (like a water main break), contaminated water from the yard—fertilizers, soil, pet waste—can be siphoned back into the home’s drinking water. Inspectors often flag missing, improperl