Pipe Flow Calculator - water velocity calculator
4 backflow preventerPVC
4 backflow preventersewer
Backflow preventers valves are devices that are installed prevent contamination of the potable water supply due to back-siphonage or backpressure from substances that are substances that are hazardous.
PipingNow offers both Reduced Pressure Principle Backflow Preventer (RPZ) and Double Check Backflow Valve Preventers (DC).
Watts4 Backflow Preventer
DCs offer protection against non-health hazards whereas RPZs offer maximum backflow protection for hazardous substances.
8615510865705 
8615510865705