The importance of leak sensors

Water leak detection sensors could save you money

Wireless (Wi-Fi) or cellular (device to device) sensor systems protect buildings and contents through remote monitoring, allowing quick action in the event of a leak. 

These systems are particularly important for churches and other large buildings that are not occupied 24/7, as well as golf course structures and other commercial buildings that are closed during winter months. 

What is a leak detection sensor? 

When water leaks, that creates high humidity or freezing risks. A sensor detects the leak and sets off a physical alarm or triggers an alert sent to a phone or computer. Some systems can even shut off water valves remotely. 

Your system should call a minimum of two individuals if a water leak is detected and require a live voice to pick up or advance automatically to the next contact on the call list. If no one answers the call should return to the first person.

Sensor placement

Place sensors in high-risk areas with floor drains or sumps or that have no heat source or only a minimal heat source.

Think about installing sensors in:

  • Areas where water faucets such as sinks, toilets, or piping are present
  • Areas where there is minimal heat or insulation or where heat tape or pipe wraps are used to keep pipes from freezing, but no heat source exists
  • Areas where past water leaks have occurred and there has not been a permanent repair made
  • Areas where there is a floor drain, a foundation wall, or an area of the building where old piping has leaked and only the leaking pipes were replaced
  • Areas where: pipes burst in the past due to limited heat; water lines are within exterior building walls and are not properly insulated; or water lines are where heat is minimal or non-existent in the area. These areas may include garages or unfinished storage rooms.
  • Areas where water lines and mechanical systems are present in the attic
  • Older sections of a building that include bathroom or kitchen fixtures and the original plumbing, especially if those pipes are galvanized, which frequently rust out
  • Sprinkler control rooms
  • Laundry rooms
  • Kitchens with dishwashers

There many brands and type of water leak sensors in a variety of price ranges but generally, you can find an effective one for your needs for $100–400.

An internet search for “commercial wireless water detectors” or “commercial cellular leak detection” will return many options to choose from.


The information included here was obtained from sources believed to be reliable. However, Grinnell Mutual Reinsurance Company and its employees make no guarantee of results and assume no liability in connection with any training, materials, suggestions, or information provided. It is the user’s responsibility to confirm compliance with any applicable local, state, or federal regulations. Information obtained from or via Grinnell Mutual Reinsurance Company should not be used as the basis for legal advice or other advice, but should be confirmed with alternative sources.