Protect Your Home with the OPD – 350


Coming Soon!

OPD – 350 Water Sensor, Alarm & Pump

  • Water Monitoring, Alert and Pump System
  • Pumps up to 340 GPH
  • Prevents flooding by pumping fluid to a safe place
  • A/C power adapter [no batteries needed]
  • DIY installation [pan not included]
  • 1 year limited warranty
  • FCC and UL approved.
  • Made in the USA
  • Patented


All-In-One Overflow Protection Device for Water Heaters

The Water Heater Watchdog by Kevlyn Pumps is a unique system for fluid detection and notification that also has a pump that can move up to 340 GPH of water. Your equipment starts to leak into a pan. The device has a sensor that can detect the water. Once detected it will start the audible alarm and send a push notification to your mobile phone. If the leak continues, another notification will be sent when there is one inch of water detected. When the water reaches a predetermined height, the pump will start. If the silence button is pushed it will reset the alarm.

Additional information

Weight2 lbs
Dimensions12 × 7 × 7 in

What’s In the Box

  • High-Density Polyethylene (HDPE) reservoir with pump
  • Two 1″ Rubber Washers
  • One 1″ NPT Locknut
  • One Power Supply
  • 20′ of 1/2″ ID Vinyl Hose


1.    Remove locknut and one rubber washer from threaded nipple leaving one rubber washer on the threads.

2.    Put the sensor wire through the water heater pan hole located on the side of the water heater pan.

3.    Put the threaded nipple through the same hole.

4.    Put the sensor wire through the rubber washer and then the locknut and fasten the locknut onto the threads. After hand tight, turn locknut ¼ turn with a wrench. Do NOT over-tighten.

5.    Remove backing from under the sensor wire to expose the sticky pad.

6.    Press the sticky side down onto the floor of the pan.

7.    Plug the power supply into the opening on the side of the pump.

8.    Plug the power supply into the GFCI wall receptacle.

9.    Press the test button on the top of the device.

a.  Both red and green lights will go on, the alarm and pump will start for a second, and then go off.
b. The red light will go out leaving only the green (ready) light on.

10. YOUR OPD350 IS READY TO WORK, NOW YOU MUST INSTALL and setup The Kevlyn Pumps mobile app.

11. Hold down the test button for 5 second to clear the processors memory and router setup information. Red and Green lights will both flash when complete.


Don’t forget to test the pump at least once every six (6) months. Kevlyn Pumps will send you a reminder on your phone.  

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