This is a kit that contains a replacement flow sensor flap as well as the rubber o-ring to repair the water flow sensors on the Bestway family of inflatable hot tubs which include the Coleman and Lay-Z-Spa brands. Failure of the flap will cause your pump/heater unit to display E02. There are a number of things that can cause the E02 error and failure of this part should be confirmed before purchasing. The o-ring will save you from leaks around the flow sensor.
Description
This kit contains both the replacement magnetic flap and a replacement o-ring seal for the water flow sensors used in the Bestway, Coleman and Lay-Z-Spa brands of inflatable hot tubs. If your pump/heater unit is displaying an E02 error and you find that your magnet is rusty due to the plastic cracking or other things like the one to the left, you should replace it with a new one as it is the most likely cause of your E02 error. The fully assembled flow sensors are selling for between $50 and $75. Why spend all that money when you can repair this yourself. 
The part you are buying is a 3D printed version made from ABS plastic with the magnet completely sealed to prevent it from being exposed to the water and rusting yet again. You also receive a high quality replacement silicone o-ring to replace your worn one under the cap.
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