What is the maximum allowable pressure loss during rated flow across a double check?

The maximum allowable pressure loss during rated flow across a double check valve is set at 10 psi. This standard is in place to ensure that the system maintains adequate pressure while preventing backflow, which is crucial for protecting the potable water supply. A pressure loss exceeding this limit could indicate an improper function of the valve or potential system inefficiencies, which may compromise the integrity of the water supply and the effectiveness of the backflow prevention.

Moreover, maintaining this specific pressure loss threshold helps to ensure that the double check valve operates within designed parameters, providing a reliable barrier against contamination and ensuring the smooth operation of the plumbing system. Proper understanding and adherence to this specification is vital for professionals in the field to ensure compliance with safety and operational standards.