DOSATRON 8.8GPM 10:1-33:1 PVDF. Water powered solution dosing technology. Kynar PVDF (polyvinylidene fluoride) design offeres great chemical and solvent resistance, mechanical strength and toughness, high abrassion resistance, and high thermal stability. All models offer external ratio adjustments. Units are self priming up to 13 feet vertically. All units are rated up to 104 degrees F.