What is one of the requirements for the connection pipe to the DPV?

The correct requirement for the connection pipe to the Double Check Valve Assembly (DPV) is that it must enter above the priming water level. This is essential because it ensures that any backflow of water does not contaminate the potable water supply. By having the connection pipe enter above the priming water level, it maintains a physical separation that minimizes the risk of back siphonage, thus protecting drinking water from potential pollutants that may exist downstream in the system.

Ensuring the connection is appropriately positioned above this level creates a safeguard in line with plumbing codes and standards designed to prevent cross-contamination. This requirement helps maintain the integrity and safety of drinking water systems, complying with regulations that govern backflow prevention in plumbing installations.