Click Here for VACUUM BREAKER, ANTI SIPHON, 3/4 INCH 

BACK FLOW PREVENTOR - BVB75M - found at - Utility Supply Group 

By: MERRILL
BACK FLOW PREVENTOR - BVB75M Brass Vacuum Breaker, 3/4 Inch Diameter, 1.7 Inches High (Back Flow Preventor)

Utility Supply Group offers this brass accessory for use in preventing water back flow through the water supply hose.

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