At what height is a RPZ typically mounted for optimal performance?

A reduced pressure zone (RPZ) backflow preventer is typically mounted between 12 inches to 6 feet above ground for optimal performance. This height allows for proper drainage and maintenance access, which are crucial for the effective functioning of the device. Mounting the RPZ at this height helps ensure that any potential discharge from the relief valve can flow away from the device, preventing possible contamination and maintaining system integrity. This placement also supports compliance with plumbing codes, which require that devices like the RPZ be accessible for testing and maintenance without the need for special tools or ladders, enhancing safety and efficiency during routine inspections.