Watts Anti-Siphon Backflow Preventer, Bronze, Watts 800 Series, NPT Connection - 800M4QT3/4" limit4 or abrasives

or abrasives

46A979 is union solder connection

slotted shaft let you close-couple with a carbonator pump

GE M9427 7

The plastic spindles are also coated with chrome electroplating and have heavy-duty springs in their interiors

Watts Anti-Siphon Backflow Preventer, Bronze, Watts 800 Series, NPT Connection - 800M4QT3/4" limit4 or abrasives800 Series,Use for health hazard continuous pressure applications where the water enters equipment at or below its flood rim.,Bronze Antisiphon Vacuum Breakers,Protect the potable water supply against backsiphonage of contaminated water in indoor point of use applications. NPT connection.,Meet USC standards.