Continue shopping “523539 Flow Valve Pentair ChemCheck Water Testing System” has been added to your cart. Product Price Quantity Total × 523539 Flow Valve Pentair ChemCheck Water Testing System $39.99 523539 Flow Valve Pentair ChemCheck Water Testing System quantity $39.99 Cart totals Subtotal $39.99 Total $39.99 Proceed to checkout — OR — Coupon: