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Bosch Therm gas and propane tankless water heaters and Bosch Powerstream electric tankless water heaters.

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Tankless Water Heater Replacement Parts

GlobalTowne sells replacement parts for all Bosch, Takagi and AO Smith gas, propane and electric tankless water heaters and electric mini-tanks. We list the most common Bosch, Takagi and AO Smith heat exchangers, water valves, gas valves, control boards, control boxes and hydrogenerator on this page. Call us at 888.726.9752 for pricing and availability on all other Bosch, Takagi and AO Smith parts.

Items 1 to 10 of 47 total

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  1. Bosch AquaStar 2400E / 2400EO / 250SX / 250SXO Heat Exchanger #8705406285

    Bosch AquaStar 2400E / 2400EO / 250SX / 250SXO Heat Exchanger #8705406285

    Bosch AquaStar 2400E / 2400EO / 250SX / 250SXO Heat Exchanger #8705406285 Learn More

    Regular Price: $539.95

    Special Price: $499.95

    Details
  2. Bosch AquaStar 2700ES / 2400ES Heat Exchanger #8738701985 (8705406422)

    Bosch AquaStar 2700ES / 2400ES Heat Exchanger #8738701985 (8705406422)

    Bosch AquaStar 2700ES / 2400ES Heat Exchanger #8738701985 (8705406422) Learn More

    Regular Price: $584.00

    Special Price: $479.95

    Details
  3. Bosch AquaStar 125BS / 1600PS Heat Exchanger #8705406189

    Bosch AquaStar 125BS / 1600PS Heat Exchanger #8705406189

    Bosch AquaStar 125BS / 1600PS Heat Exchanger #8705406189 Learn More

    Regular Price: $549.95

    Special Price: $459.95

    Details
  4. Takagi / AO Smith Heat Exchanger Kit 100276637

    Takagi / AO Smith Heat Exchanger Kit 100276637

    Takagi / AO Smith Heat Exchanger Kit 100276637 Learn More

    Regular Price: $522.95

    Special Price: $449.95

    Details
  5. Bosch AquaStar 125 Heat Exchanger #8705406380 (8705406235)

    Bosch AquaStar 125 Heat Exchanger #8705406380 (8705406235)

    Bosch AquaStar 125 Heat Exchanger #8705406380 (8705406235) Learn More

    Regular Price: $445.95

    Special Price: $399.95

    Details
  6. Bosch AquaStar 2700ES / 2400ES / 2400E / 250SX / 250SXO Gas Valve #8707021019

    Bosch AquaStar 2700ES / 2400ES / 2400E / 250SX / 250SXO Gas Valve #8707021019

    Bosch AquaStar 2700ES / 2400ES / 2400E / 250SX / 250SXO Gas Valve #8707021019 Learn More

    Regular Price: $497.95

    Special Price: $399.95

    Details
  7. Bosch AquaStar 1600 Heat Exchanger #8705406386

    Bosch AquaStar 1600 Heat Exchanger #8705406386

    Bosch AquaStar 1600 Heat Exchanger #8705406386 Learn More

    Regular Price: $429.95

    Special Price: $389.95

    Details
  8. Bosch AquaStar 1600H-LP Gas Valve #8707011962

    Bosch AquaStar 1600H-LP Gas Valve #8707011962

    Bosch AquaStar 1600H-LP Gas Valve #8707011962 Learn More

    Regular Price: $398.69

    Special Price: $339.95

    Details
  9. New Bosch Tronic 6000C WH17 PCB Control Board #8738710921 for S/N 555A & Up

    New Bosch Tronic 6000C WH17 PCB Control Board #8738710921 for S/N 555A & Up

    Bosch Tronic 6000C WH17 PCB Control Board (8738710921) Learn More

    Regular Price: $429.95

    Special Price: $329.95

    Details
  10. Bosch AquaStar 1600H-NG Gas Valve #8707011976

    Bosch AquaStar 1600H-NG Gas Valve #8707011976

    Bosch AquaStar 1600H-NG Gas Valve #8707011976 Learn More

    Regular Price: $428.69

    Special Price: $322.95

    Details

Items 1 to 10 of 47 total

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