Backflow Preventer Calculator
Select the appropriate backflow prevention device type and size based on pipe diameter and hazard level.
How to Use the Backflow Preventer Calculator
- Enter the pipe diameter in mm.
- Enter the flow rate in L/s.
- Select the hazard level.
- Click Calculate for device type and size.
Casos de Uso
- •Irrigation system backflow protection.
- •Commercial building water service.
- •Industrial process connection.
- •Plumbing code compliance.
Fórmula
Device type by hazard: Low→DCV, Medium→RPZ, High→RPDA. Size = nearest standard DN ≥ pipe diameter.
Perguntas Frequentes
What is backflow?
Backflow is the reverse flow of contaminated water into the potable water supply, posing a health risk.
What is a high hazard connection?
High hazard connections include chemical dosing, irrigation with fertilisers, or industrial process water.
What is an RPZ valve?
A Reduced Pressure Zone (RPZ) valve uses differential pressure zones to prevent backflow even under back pressure.