Back(flow) to the future!
Backflow prevention is crucial to maintain hygiene in drinking water supplies. The first efforts to address backflow risks date back to 1930, with pressure vacuum breakers developed and installed for some connections in Los Angeles. The first (recorded) widespread incident was in Chicago in 1933, where defective plumbing and cross connections resulted in 98 deaths. While perhaps not high on his list of priorities, Marty McFly may have noticed a significant improvement in back