What functions are integrated in a hydrometer valve?

• A. Master valve
• B. Water meter
• C. Flow sensor
• D. Master valve, water meter and flow sensor

Answer: (D)

A hydrometer valve is designed to manage the water supply while also measuring and monitoring how water moves through the system. It combines three key functions in one unit.

First, the master valve shuts off the main irrigation supply. This protects the system from water hammer, helps isolate the system for maintenance, and can stop a leak from flooding the area when needed.

Second, the water meter measures the total volume of water that passes through. This provides accurate usage data for scheduling, budgeting, and detecting unusual consumption.

Third, the flow sensor monitors real-time flow through the line. It lets the controller verify that the expected flow is occurring in each zone and can flag leaks, blockages, or faulty emitters by comparing actual flow to expected flow.

Together, these features give a compact, integrated solution that controls water delivery, records usage, and provides immediate flow feedback.