Commercial Plumbing

• Certified Backflow Prevention
  • Backflow can be caused by back-pressure, when four conditions exist simultaneously in a water supply system:
    • Water pumps/boost pumps (e.g. ship docks, marinas, industrial plants, etc.)
    • Boilers with increased temperature
    • Private water supply system inter-connected with public water supply systems
    • Elevated tanks or other pressure producing system
  • Backflow can be caused by back-siphonage, when four conditions exist simultaneously in a water supply system:
    • Pressure in the water distribution system below atmospheric, which is called negative pressure;
    • An open water supply valve;
    • The outlet of the open water supply valve is immersed in a fluid contamination source (e.g. chemical mixing tank in an industrial building, public swimming pool, a full bath tub in residential building, etc.);
    • Absence of protection from back-siphonage (this includes the malfunctioning of an existing device).
  • Some typical scenarios that can cause back-siphonage are:
    • Breaks in a water main
    • Drainage of the water supply system for repairs
    • Shut-off of high-raised water supply