Flapper foot valves prevent water from back flowing into the water source. They use a flapper that closes when the pressure of the flow decreases ensuring there is no backflow.
1.800.561.3164
25 Whaley Avenue
P.O. Box 310
Milverton, Ontario
N0K 1M0 Canada
Boshart Industries LLC
3601 Woodpark Blvd. Charlotte, NC 2820 USA