Waterway Jet Internal Eyeball Fitting [1 1 2" MPT x 2 1 4" FD] [Black] (212 9171) controlsystems A properly selected replacement helps A properly selected replacement helps preserve the intended schedule behavior of the equipment instead of forcing the user to adopt a less suitable substitute 0 HP wet end impeller is designed for compatible pump applications where the impeller needs replacement to restore strong water movement through the wet end The Waterway 212 9171 jet internal eyeball fitting is designed for compatible applications using a 1 1 2 inch male pipe thread connection and a 2 1 4 inch face diameter in black Replacing the fitting with the correct Waterway part can improve both the direction of water movement and the final appearance of the jet area