Pentair Purex SMBW 4000 Series Filter Diagram Filtering with diatomaceous earth (D.E.) removes particles so small they are individually undetected by the human eye, but combine to decrease water clarity. 4000 Series™ filters remove the tiniest of contaminants, so your water truly sparkles. In addition to exceptional filtration, Pentair SMBW 4000 Series D.E. filters feature sheet molded fiberglass tanks and Noryl® rotary backwash valves for long life, dependable performance and easy maintenance. Our SMBW 4000 Series™ Filters remove the tiniest of contaminants, so your water truly sparkles. In addition to exceptional filtration, they feature sheet molded fiberglass tanks and Noryl® rotary backwash valves for long life, dependable performance and easy maintenance.   1 073027 Complete gauge assembly includes:*** 98209800 High Flow manual relief valve**** 190059 Pressure gauge 071982 Tee 1/4 in. brass 071390 Nipple, plastic, 1/4 in. 075207 Valve air release 1/4 in. 273550 Air relief assembly 154412 Bulkhead nut 2 197135 Lid SM/SMBW 4036 replacement 197136 Lid SM/SMBW 4048 replacement 197137 Lid SM/SMBW 4060 replacement 3 197020 Clamp ring assembly 076033 Knob, plastic** 071136 Knob, plastic* 4 071019 Holding wheel 4024,4036, 4048, 4060 5 071404 Nut wing 6 072173 Washer, flat 5/16 in. SS flat 7 072870 Center
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