Small Devices, Big Impact: The Importance of Leak Detection

Water damage poses significant risks to buildings and can lead to costly repairs, operational downtime, and equipment loss. Detecting leaks early, before they get out of control, is crucial in mitigating these risks. Integrating leak detection sensors in tandem with isolation valves offers an effective and proactive approach to protecting buildings from costly water damage.

​The International Plumbing Code (IPC) emphasizes the importance of isolation valves in plumbing systems to facilitate maintenance as well as emergency interventions. Section 606.2 mandates the installation of isolation valves, sometimes called shut off valves, in specific locations for both residential and commercial buildings. Notably, isolation valves are required on the fixture supply to each plumbing fixture, with exceptions for bathtubs and showers in certain residential settings, and on the water supply pipe to each appliance or piece of mechanical equipment. These provisions ensure that water flow can be promptly and effectively shut off when it needs to be, enhancing the safety and functionality of plumbing systems in buildings.

While the simple inclusion of shut-off valves in buildings can enhance control over water systems, they do not inherently detect leaks. The addition of leak detection sensors under these isolation valves can provide immediate responses to leaks, preventing extensive damage and associated costs.​

Belimo offers compact and affordable solutions designed to detect liquid leaks in various settings, including containers, drain pans, false floors, suspended ceilings, and equipment rooms. The 22HL-50 model features a single relay contact that can be wired to alert a control system, trigger an alarm, or close a valve to halt the flow of liquid. It features an easy-to-read green/red “traffic light” status LEDs for clear visual indication of leaks, and its adjustable height allows the sensor to be configured to detect the specified liquid level. Encased in an IP65 / NEMA 4 rated enclosure, this sensor is built for durability and reliability. ​

For applications requiring more complex responses, the 22HL-502 model offers dual relay contacts, allowing the device to simultaneously send an alarm and initiate actions such as closing a valve or turning off a pump. Each relay can handle either a low current signal or up to 6A at 24V. Additionally, the switches have a safe lock function, ensuring that in the event of a power failure, the relay will switch to signal the fault. ​

Incorporating devices like the 22HL series into building management systems adds a layer of protection by enabling immediate responses to detected leaks. This proactive approach safeguards property, prevents costly repairs, and ensures the longevity of equipment and infrastructure.

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Reference:

International Code Council, International Plumbing Code, 2021 ed., sec. 606.2, accessed April 10, 2025, https://codes.iccsafe.org/s/IPC2021P1/chapter-6-water-supply-and-distribution/IPC2021P1-Ch06-Sec606.2.