I have used them for several years and not really sure how much extra life I get, but they do seem to keep the bay clean and the water level more stable, but do feel that for the price it's a safe insurance no matter. Karl blade who owns Newell told me he got the tip on these from a truck company owner that swears by them and they are standard equipment on all Newells the past few years
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Larry & Hedy Brachfeld
2003 Double Slide, Detroit 60
Coach # 646
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