Sink clogged again? Just turn the knob on the outside of the PermaFlow, and a flexible rubber paddle inside rotates through the trap to push the wad downstream. PermaFlow also helps keep glop from gathering in the first place, with a subtle angle in the incoming pipe that generates turbulence to carry it away. If something does get stuck, turning the paddle to nine o’clock creates a bypass through the top of the circle. Six gaskets protect the seal where the knob enters the trap—a redundancy that kept it watertight in tests for up to 31,000 rotations. From $40; pfwaterworks.net
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