<p>High quality COMPLETE backup valve for Polaris 280 180 380 and 3900Includes G53 mechanism inside, G57 clamp and outer shellEasy to install, simply disconnect the old valve and insert the hoses into the connectors of the new one. Be careful to respect the direction of assembly.If your Polaris pool sweep is experiencing issues such as getting stuck on the edges of the pool or having a hard time turning aroundthis could be faulty valve, then it's time to check and replace with this upgraded backup valve</p> <p>This product is not produced by the original manufacturer. It is a replacement that is perfectly compatible with this model and is produced by the accessories manufacturer. It is not an original product produced by the brand factory.</p>