Watts G4000 FDA Part of the G4000 FDA Series Window Well Extension Specifications Brand Watts Diameter 24 Specifications Brand Watts Diameter 24 IN Inlet Connection Size 1 1 2 IN Inlet Connection Size Metric 40 MM Inlet Connection Type Male Threaded Lead Free YES Maximum Operating Temperature Fahrenheit 240 Maximum Working Pressure PSI 150 Mount Type Free Standing Tank Acceptance 53 Gallons Specification Sheet DETA This 1 inch anti siphon pressure vacuum breaker backflow preventer helps prevent the reverse flow of polluted water from entering into the potable water supply due to backsiphonage Since it is FDA approved it is ideal for potable water and food contact applications Manual gear operator