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The PL-122 was the original Polylok Filter. It was the first and still to this day the only filter on the market with an automatic shutoff ball installed with every filter. When the filter is removed for regular servicing the ball will float up and prevent any solids from leaving the tank. The patented design cannot be duplicated.
Polylok offers the only filter on the market where you can get more GPD by simply snapping our filters together.
The Extend & Lok is an easy to use solution that can extend the inlet or outlet pipe and make filter and/or baffle installation simple. Connects 4" SCH40 to any 4" ID pipe.