backflow valve การใช้

• The system should be flushed before the backflow valve is installed
• If the system is not flushed until after the backflow valve is installed , remove both check modules from the valve and open the inlet shutoff to allow water to flow for a sufficient time to flush debris from the water line
• If the system is not flushed until after the backflow valve is installed , remove both check modules from the valve and open the inlet shutoff to allow water to flow for a sufficient time to flush debris from the water line