DE HB453

Exempts single-family residences, single-family residences with professional offices, professional offices, and commercial buildings classified as "low hazard" from being required to install backflow preventors.

Defines "low hazard" buildings as those where backflow would only cause aesthetic degradation, pose no health hazard, not disrupt water service, and occur only through backsiphonage.

Requires backflow preventors on otherwise low-hazard properties if they have in-ground lawn sprinkler systems, swimming pools, hot tubs, fire sprinkler systems, or similar devices connected to the fresh water supply.

Changes "shall" to "must" in § 7911(b) regarding adequate water supply to conform with Delaware Legislative Drafting Manual standards.

Reduces compliance costs for small businesses and homeowners by eliminating installation and yearly inspection requirements for backflow preventors on low-hazard water users while protecting the fresh water supply.