Installed my system 3 years ago. The instructions state to replace the o-rings with every filter change, but this is not necessary. You will work much longer. But with every filter change I found it more and more difficult to put the o-rings back in place and I found that after 3 years I had definitely justified my money buying original filters. These worked fine.
Filter under the sink Aquaphor Favorit ECO silver
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NANPU 1 FRL Air Filter Regulator Lubricator Combo With 0-150 Psi Gauge, 5 Micron Brass Element, Poly Bowl & Semi-Auto Drain - Metal Bracket Included
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NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
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π§ NANPU 1/2" NPT Compressed Air Filter Regulator Combo Piggyback with Auto Drain, 5 Micron Brass Element, Poly Bowl, Metal Bracket, and 0-150 psi Gauge
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