Polaris Vac-Sweep 360 In-Line Back-up Valve (9-100-1200)
The in-line backup valve is a replacement part made by Polaris. Making this a genuine OEM product.
This backup valve was designed to be the feature that backs the pressure side cleaner out of any corners or edges along with the pool steps which would cause the cleaner to be hung up or impeded. Without it, the cleaner would be insufficient in its ability to suck and pull up dirt and debris off your pool’s surface.
This part is white and should be located approximately 18 inches from the head of the cleaner and will turn on every 2 ½ to 3 minutes to pull the cleaner out of tight corners or trouble spots. A great troubleshooting tip if the cleaner is tangled up via the hoses or floating at the top of the pool water would be to check this backup valve to see if it is operating correctly, start by pulling the cleaner out of the water. It should run for approximately 30 seconds, if it runs longer than this then it means the internal mechanism has failed and is stuck in the open position. Just make sure you are purchasing the full assembly with the mechanism included, replacing just the outer case will not correct this issue. You can also purchase just the mechanism itself here on our site.
Works with this pressure-side pool cleaner:
Polaris Vac-Sweep 360