Backflow Prevention Assembly Sizing

Sizes backflow prevention assemblies (RPZ, DC, PVB) based on flow rate and pressure loss.

Peak demand.
GPM
Available supply pressure.
psi
Required at fixtures.
psi
Backflow preventer type.

Results

Available Pressure Loss-psi
Typical Assembly Loss-psi
Recommended Assembly Size-inches
References: USC FCCCHR, ASSE Standards, Manufacturer Data