Delaware limits local backflow rules for certain low-hazard buildings

Counties and municipalities may not require backflow devices or inspections in certain buildings. The rule covers single-family homes, homes with permitted professional offices, professional offices, and commercial buildings that meet the low-hazard limits. A building counts as low hazard only if backflow happens by backsiphonage and creates no health, drinking-water, or fresh-water risk. Its pumping system also cannot connect to systems carrying wastewater, fertilizers, or chemicals, or to fire protection; limits also apply to wells and aquifers. If a low-hazard building gets fresh water from a public well, its backflow devices must follow state rules for wells. The Act expires 10 days after the Department of Health and Social Services publishes notice that a state regulation has been updated to address backflow devices in low-hazard buildings.