This is a kit that contains a replacement flow sensor paddle with retainer pin as well as the gasket seal to repair the water flow sensors on the new Bestway family of inflatable hot tubs which include the Coleman and Lay-Z-Spa brands. 
Description
This water flow sensor repair kit contains both the replacement magnetic paddle, the paddle retainer pin and a replacement gasket for the water flow sensors used in the new Bestway, Coleman and Lay-Z-Spa brands of inflatable hot tub pumps. 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 Water flow sensor repair 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 gasket to replace your worn one under the cap. Also, If your pin is broken, no need to worry due to popular demand I am now including a replacement paddle retaining pin in every kit. If your gasket is still in good shape and all you need is the paddle and pin , check out my other kit by clicking here.
NOTE: Please check and make sure that this is the part that you need prior to ordering. There are many causes of the E02 error and this is only one of them. It may be worth it to check out my article “Fixing the dreaded E02 error on your Bestway, Coleman or Lay-Z-Spa tub” prior to purchasing this part. I also have a second article that I wrote called “Repairing yourBestway, Coleman or Lay-Z-Spa water flow sensor.” This article goes more in depth on how to fully test your water flow sensor using a multimeter prior to purchasing.
Greg (verified owner) –
Exactly what I needed to fix the E02 error code. For mine, the pin was broken but used this kit to replace all of the parts and get the hot tub back in operation. Only had for 1 year so was thrilled to find this site because Bestway parts and service are nonexistent.
Brett Elliott (verified owner) –
Bingo! This was exactly what I needed. I suspected this was the issue through some tinkering. Easy payment and fast delivery. Great service. I ordered on a Saturday and it was here on the east coast on Thursday. After about 10 minutes to install, I turned it on and it’s been heating back up without failure. I can’t wait to get back up to 104 and take a dip. Thanks!