The pool cleaner valve replacement kit is compatible with a 180, 280, 380, 480, 3900 pool cleanerThe G52 aftermarket valve replacement is easy to install, simply disconnect the hose from the pool cleaner. 'old hose, then reconnect the hose to the new valve.The backup valve on the pool is mainly made of strong, crack-resistant and durable plastic materials for a long service lifeYou can get a G52 backup valve kit which includes G52 spare valve housing and internal drive and its length is 20cm.The pool cleaner parts kit has been tested before leaving the factory, if you can't spray water after using for a period of time, you can take out the hardware to check if there is anything stuck, it can be used normally after clearing the debris.