Continue shopping “Pentair Rainbow 300 and 320 Pool Chlorinator 20 inch Extension R172283” has been added to your cart. Product Price Quantity Total × Pentair Rainbow 300 and 320 Pool Chlorinator 20 inch Extension R172283 $51.01 Pentair Rainbow 300 and 320 Pool Chlorinator 20 inch Extension R172283 quantity $51.01 Cart totals Subtotal $51.01 Shipping Shipping costs will be calculated once you have provided your address. Total $51.01 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update