What is the required installation height for an RPPA backflow device?

The required installation height for a Reduced Pressure Principal Assembly (RPPA) backflow device is typically 12 inches above the ground or the flood level rim of the fixture it serves. This height is essential for ensuring that there is adequate clearance for the backflow device, which allows for proper drainage and prevents contamination of the potable water supply. Installing the device at this height also facilitates maintenance and inspection, ensuring operators have easy access without compromising safety. Adhering to this installation standard is key for compliance with plumbing codes and regulations that aim to protect public health.