Photo 1 of Dusledel Upgraded 571-VAC-CHK-A Brass RV Vacuum Breaker Check Valve, 571 Camper Trailer Flusher Backflow Preventer on Black Tank System

Double tap image to zoom

Photo 1 of Dusledel Upgraded 571-VAC-CHK-A Brass RV Vacuum Breaker Check Valve, 571 Camper Trailer Flusher Backflow Preventer on Black Tank System Photo 2 of Dusledel Upgraded 571-VAC-CHK-A Brass RV Vacuum Breaker Check Valve, 571 Camper Trailer Flusher Backflow Preventer on Black Tank System