Check the listing for details. Replacement Bestway Water Flow Sensor Cap. Condition: New. Listed at 15.00 USD. For all Bestway, Coleman and Lay-Z-Spa egg style pumps.Is the cap to your water flow sensor cracked or broken? Have you overtightened the screws and stripped the tabs that hold it in place? This replacement cap will get you back running in no time. The replacement cap includes a replacement o-ring seal for the main housing. You will need to re-use your original reed switch (with rubber sleve), reed switch retainer bracke, magnetic paddle and pin. If your magnetic paddle is also bad you will need to order that separately. Check my store listings as I sell a kit with the manetic paddle and pin. All of my parts have a quality assurance guarantee. I guarantee all of my parts for 6 months from the date you receive it so you can be assured that the part is going to work. If the part breaks or has any issues, contact me and I will send a replacement at no charge to you and no need to hassle with returning the old part. AS NOTED ABOVE: This water flow sensor cap is designed for the older egg style pumps and will not work for the newer rectangular pumps.