Continue shopping “Pentair ETI400 Heat Pump Stack Flue Sensor 475601” has been added to your cart. Product Price Quantity Total × Pentair ETI400 Heat Pump Water Bypass Assembly 475621 $37.99 Pentair ETI400 Heat Pump Water Bypass Assembly 475621 quantity $37.99 × Pentair ETI400 Heat Pump Outlet Plumbing 475614 $289.99 Pentair ETI400 Heat Pump Outlet Plumbing 475614 quantity $289.99 × Pentair ETI400 Heat Pump Spark Ignition Electrodes 476081Z $104.99 Pentair ETI400 Heat Pump Spark Ignition Electrodes 476081Z quantity $104.99 × Pentair ETI400 Heat Pump Stack Flue Sensor 475601 $57.99 Pentair ETI400 Heat Pump Stack Flue Sensor 475601 quantity $57.99 Cart totals Subtotal $490.96 Total $490.96 Proceed to checkout — OR — Coupon: