Water piping supplying three single-family residences on a single premises shall be equipped with a separate what type of valve?

The requirement for a separate full open valve in the water piping supplying three single-family residences is crucial for ensuring effective maintenance and safety of the plumbing system. A full open valve is designed to allow the maximum flow of water when fully opened, which is essential for isolating each residence's supply. This capability becomes especially important during repairs or maintenance tasks, allowing the plumbing system to be shut off completely while service is performed without disrupting the water supply to the other residences.

The use of a full open valve also supports compliance with local plumbing codes, which often mandate that the water supply to separate units must be capable of being controlled independently. This provides not just functionality, but also enhances safety, as it prevents the risk of backflow or cross-contamination between the residences when maintenance activities are carried out.

In contrast, options such as check valves or pressure relief valves serve different purposes in plumbing systems. Check valves are designed to prevent backflow in the piping, while pressure relief valves are intended to manage excess pressure and protect against potential hazards. Quarter turn valves, while providing a quick on/off function, do not necessarily ensure the functionality and flow control required in this scenario. Thus, the choice of a full open valve is critical for the effective operation and management of the