Continue shopping “475601 Pentair ETI400 Heat Pump Stack Flue Sensor” has been added to your cart. Product Price Quantity Total × DE Diatomaceous Earth Swimming Pool Filter Powder 25lb DE25 $54.87 DE Diatomaceous Earth Swimming Pool Filter Powder 25lb DE25 quantity $54.87 × 475601 Pentair ETI400 Heat Pump Stack Flue Sensor $53.04 475601 Pentair ETI400 Heat Pump Stack Flue Sensor quantity $53.04 Cart totals Subtotal $107.91 Shipping Shipping costs will be calculated once you have provided your address. Total $107.91 Proceed to checkout — OR — Calculate shipping Country / region: Select a country / region… United States (US) State / County: City: Postcode / ZIP: Update