What is a typical arrangement for two independent cold water feeds?

• A. Redundancy for reliability or to supply different pressure zones.
• B. To heat water.
• C. To reduce the number of valves.
• D. To complicate maintenance.

Answer: (A)

Two independent cold water feeds are mainly about reliability and pressure control. Having a second, separate feed means the building can keep receiving water if one line is out of service or needs maintenance, reducing the chance of a total outage. It also allows different parts of the building to be served at appropriate pressures—upper floors or high-demand areas can be fed from a dedicated line or via separate pressure-regulating arrangements. This isn’t about heating water (that’s done by the hot water system), and it isn’t primarily to reduce valves; you still need isolation and backflow protection on each feed. The setup actually makes maintenance easier by allowing work on one feed while the other continues supplying water.