The B-Pure™ 1/2 Size Filter Holder (D2772-1) has a natural polypropylene material construction that maintains purity. Filters are easily and quickly replaced with 1/4-turn quick release canisters. Accepts 10" (25.4) cm) pre- and post-filters. Wall mount. Economy Filter Holders (D2772-1E & 1F) accept virtually all 10" (25.4 cm) double, open-ended filters. Can be piped into any water line. Available in 10" and 20" holders. Post-filters for the B-pure 1/2 Size Filter Holder have a pleated, non-leachable construction. 10" double open-ended design. 4.7 square feet of filtration material provides for long life. Filters available for many applications; low pressure drop and high flow rate. Absolute filtration at rated pore size. The accessory Pressure Gauge Kit attaches into any B-pure system. 0 to 160 psi pressure gauge for monitoring inlet and outlet water pressure. Monitors pressure drop across any of the 10" (25.4 cm) filter cartridges used in the B-pure 1/2 Size Holder (D2772-1). Pressure drop of greater than 10 psi indicates need for filter change.