Pentair Pool Products - SMBW 4000 Series Filters

Filtering with diatomaceous earth (D.E.) removes particles so small they are individually undetected by the human eye, but combine to decrease water clarity. But 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.

Standard Product Features

Unique Spiro-Mite curved grid design ensures an even flow and uniform distribution of D.E. for optimum filtration efficiency and longer periods between cleanings.

Corrosion-resistant 20" diameter fiberglass filter tank is strong, durable and made to last for years.

Filter’s refined internal design minimizes flow restrictions so that the least amount of pumping power produces the maximum required flow rates?for lower utility costs.

Exclusive clamp ring design is safe, strong and reliable permits quick and easy access to internal components.