Bosch Aquastar 125BS/1600PS Heat Exchanger

The Bosch Aquastar 125BS Solar Heat Exchanger Part number 8705406189 is the replacement heat exchanger for the Bosch Aquastar 125BS tankless water heater. It is also the replacement heat exchanger for the Bosch Aquastar 1600PS tankless water heater.

The Bosch Aquastar 125BS/1600PS Heat Exchanger will NOT work for the Bosch Aquastar 125 series, 425PN, 425HN and 425HNO tankless water heaters. Please click the link for a Bosch Aquastar 125 series heat exchanger part number 8705406380.