Saginaw, MI – PlastaFlex™ PW Potable Water Geomembrane has obtained approval from the National Sanitation Foundation for use in tanks as small as 100 gallons. PlastaFlex PW meets NSF 61 drinking water system components standards. The membrane is listed for use as a tank liner, storage tank/reservoir, or liner. The membrane is also approved for use as a pipe liner in pipes greater than 16” diameter. The durable geomembrane has been specially formulated to meet the stringent physical property, layflat, and squareness needs found in reservoir, cistern, city water tank, and drinking water vessel applications.