Terminal RPZ backflow preventer type BA for flexible connections
Fluid category 4 safety valves
KEMPER RPZ backflow preventers type BA protect drinking water from non-potable water up to and including fluid category 4.
Definition of fluid category 4 based on DIN EN 1717
Fluid that represents a health hazard for human beings through the presence of one or more toxic or very toxic substances or one or more radioactive, mutagenic or carcinogenic substances.
Practical use examples:
- Chemical mixing means, e.g. disinfectants, fertilisers, etc.
- Heating filling device, water with inhibitors
- Non-certified softening systems
- High-pressure cleaners
The European standard DIN EN 1717, under Section 5.3.2 Connections, states:
“All connections to the drinking water installation are regarded as permanent connections.” This means that all protection devices against backflow, back pressure and siphon backflow must be designed as if there were a permanent connection. Valves with hose connections must be designed in such a way that the maximum expected protection case can be covered.
You can find more information on choosing the right safety valves in our guidebook.
Go to safety valves guidebook