Filter Screen Design:Prevents large impurities like leaves and toys from being sucked into the filter pump, while the threaded design enables quick connection to the pool pump hose. Rubber Ring Seal:When installing, please ensure that the threaded filter inlet and the rubber ring are tightly attached to the tank to creates a tight, leak-proof barrier,avoid leakage.It is recommended to apply silicone above and below the rubber ring. Tool-Free Easy Installation: Threaded design allows straightforward attachment to the pump hose,Fit for 1-1/2" Hose. Wide Compatibility: Works with stock tanks of various sizes and shapes;please note install on smooth-sided areas to ensure proper sealing and avoid leakage from irregular shells. Minimizes modification:Minimizes modification to your tank, just drill two holes to connect the swimming pool pump and establish a filtering circulation,maintaining water circulation without full water changes make your pool maintainence more easier. The filter pump and plunger valve can be connected to the storage tank through Threaded Inlet Strainer Kit.Fit for 1-1/2" Hose.