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Backflow Prevention Support - Helpful Tools and Resources

757, 757N Approvals

Double Check Valve Assemblies, Stainless Steel

USC Approvals Explanation Download

Size Model ASSE CSA FM UL ULC USC
2-1/2"
3"
4"
6"
8"
2-1/2"
3"
4"
6"
8"
10"
2-1/2"
3"
4"
6"
8"
10"
2-1/2"
3"
4"
2-1/2"
3"
4"
6"
8"
2-1/2"
3"
4"
6"
8"
10"
2-1/2"
3"
4"
6"
8"
10"
2-1/2"
3"
4"

OS&Y - Outside Stem & Yoke
NRS - Non-Rising Stem
BFG - UL/FM Gear Operated Groved Butterfly Valve
LF - Specifies Replacement Parts Only

For the latest product certification information and documentation, please visit our certification partner websites:

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USC Cross-Connections in Household Plumbing Systems Study

There are a number of potential cross-connections in household plumbing systems that must be protected against backflow. To learn more about these hazards and to download a recent study from USC on cross-connections in household plumbing systems,

For more info, click here.

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