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Bosch Aquastar 125B Water Heater Repair Parts - Pre January 2003

Bosch Aquastar 125B Gas Tankless Water Heater Repair Parts for heaters produced before January 2003. Go to this chart if you are not sure - click here to be go this Chart. You will need your first 3 digits of the serial number of the Aquastar 125B

Water Heater repair parts ship via Fedex or USPS. Most small, light weight parts on this page ship via USPS. Please be sure to provide us with a valid postal address if it's different than the UPS address.

Most shipments are received within 2 to 10 business days.

Warning! All parts are non-returnable!

Viewing 35 Products

View All Bosch BBT Products

- v13254
- Bosch Aquastar 125B Gas Valve NG - LOC 3381 - 7738002271 - 8707021090 - Non-returnable
  
  • Old Part Numbers 8707011459 and 8707021090KIT • LOC 3381 • Part Works For
  
  870701145999 • View Detail • Free Ground Shipping
  
  $245.75
- $245.75
  
  Qty
- v7047
- Bosch Aquastar 125B Gas Valve LP - LOC 3382 - Old Number was 8707021091KIT - 7738002283 - Non-returnable
  
  • LOC 3382 • Part Works For
  
  870701146399 • View Detail • Free Ground Shipping
  
  $268.75
- $268.75
  
  Qty
- v7045
- Bosch Aquastar 125B Water Valve Assembly (conversion kit) - 8707002499 - Non-returnable
  
  • Old Part Number 87070024990 • LOC 3365 • Part Works For
  
  870700249999 • View Detail • Free Ground Shipping
  
  $223.75
- $223.75
  
  Qty
- v6262
- Bosch Aquastar 125B Heat Exchanger - 8705406380 - Non-returnable
  
  • Old Part Number 8705406235 & 87054063800 • LOC 3305 • Part Works For
  
  870540623999 • View Detail • Free Ground Shipping
  
  $399.75
- $399.75
  
  Qty
- v7048
- Bosch Aquastar 125B Water Connections Gasket - 8710103043 - Non-returnable
  
  • Old Part Number 87101030430 • LOC 3565 • Part Works For
  
  871010304999 • View Detail • Free Shipping Eligible
  
  $4.75
- $4.75
  
  Qty
- v7049
- Bosch Aquastar 125B Water Valve Set Screw - 8703401165 - Non-returnable
  
  • Old Part Number 8703401051 • LOC 3220 • Part Works For
  
  870340105999 • View Detail • Free Shipping Eligible
  
  $8.95
- $8.95
  
  Qty
- v7051
- Bosch Aquastar 125B Inlet Filter - 8700507059 - Non-returnable
  
  • LOC 3110 • Part Works For
  
  870050705999 • View Detail • Free Shipping Eligible
  
  $14.75
- $14.75
  
  Qty
- v7053
- Bosch Aquastar 125B Water Elbow Fitting - 8700703114 - non-returnable
  
  • Old Part Number 87007031140 • LOC 3120 • Part Works For
  
  870070311400 • View Detail • Free Shipping Eligible
  
  $90.75
- $90.75
  
  Qty
- v7054
- Bosch Aquastar 125B Cold Water Pipe - 8700705294 - Non-returnable
  
  • LOC 3130 • Part Works For
  
  870070529999 • View Detail • Free Shipping Eligible
  
  $31.95
- $31.95
  
  Qty
- v7055
- Bosch Aquastar 125B Hot Water Pipe - 8700705556 - Non-returnable
  
  • Old Part Number 87007055560 • LOC 3140 • Part Works For
  
  870070555999 • View Detail • Free Shipping Eligible
  
  $57.95
- $57.95
  
  Qty
- v7057
- Bosch Aquastar 125B Temp Adjustment Collar and Knob - 8702000219 - Non-returnable
  
  • Old Part Number 8700403008 or 87020002190 • LOC 3075 • Part Works For
  
  870040300992 • View Detail • Free Shipping Eligible
  
  $25.95
- $25.95
  
  Qty
- v7050
- Bosch Aquastar 125B Water Valve Diaphragm - 8700503053 - Non-returnable
  
  • Old Part Number 87005030530 • LOC 3080 • Part Works For
  
  870050305992 • View Detail • Free Shipping Eligible
  
  $42.75
- $42.75
  
  Qty
- v7059
- Bosch Aquastar 125B Pilot Assembly NG or LP - 8718105051 - Non-returnable
  
  • Old Part Number 87181050510 • This Pilot Assembly does not include the Pilot Injector • See NG Pilot Injector 8708200005 or LP Pilot Injector 8748200173 • LOC 3585 • Part Works For
  
  871810505999 • View Detail • Free Shipping Eligible
  
  $32.75
- $32.75
  
  Qty
- v7061
- Bosch Aquastar 125B Pilot Air Screen - 8700507055 - Non-returnable
  
  • Old Part Number 87005070550 • LOC 3105 • Part Works For
  
  870050755999 • View Detail • Free Shipping Eligible
  
  $5.95
- $5.95
  
  Qty
- v7062
- Bosch Aquastar 125B Pilot Injector Natural Gas - 8708200005 - Non-returnable
  
  • Old Part Number 87082000050 • LOC 3500 • Part Works For
  
  870820000999 • View Detail • Free Shipping Eligible
  
  $5.75
- $5.75
  
  Qty
- v7063
- Bosch Aquastar 125B Pilot Injector - Propane Gas - 8748200173 - Non-returnable
  
  • LOC 3610 • Part Works For
  
  874820017999 • View Detail • Free Shipping Eligible
  
  $7.75
- $7.75
  
  Qty
- v7064
- Bosch Aquastar 125B Pilot Tube - 8710707166 - Non-returnable
  
  • Old Part Number 8700707320 • LOC 3161 • Part Works For
  
  870070732999 • View Detail • Free Shipping Eligible
  
  $39.75
- $39.75
  
  Qty
- v7058
- Bosch Aquastar 125B Temp Adjustment Knob - 8702000111 - Non-returnable
  
  • Old Part Number 87020001110 • LOC 3205 • Part Works For
  
  870200011992 • View Detail • Free Shipping Eligible
  
  $15.75
- $15.75
  
  Qty
- v7067
- Bosch Aquastar 125B Overheat Sensor (ECO) - 8707206040 - Non-returnable
  
  • Old Part Number 87072060400 • LOC 3405 • Part Works For
  
  870720604992 • View Detail • Free Shipping Eligible
  
  $64.75
- $64.75
  
  Qty
- v7068
- Bosch Aquastar 125B Electromagnet - 8707201012 - Non-returnable
  
  • Old Part Number 87072010120 • LOC 3395 • Part Works For
  
  870720101992 • View Detail • Free Shipping Eligible
  
  $50.75
- $50.75
  
  Qty
- v13255
- Bosch Aquastar 125B Regulator Natural Gas - LOC 3000 - 7738000883 - Non-returnable
  
  • Old Part Number 8342400000 • LOC 3000 • Part Works For
  
  834240000999 • View Detail • Free Shipping Eligible
  
  $67.75
- $67.75
  
  Qty
- v7070
- Bosch Aquastar 125B Regulator Propane Gas - 8345520000 - Non-returnable
  
  • LOC 3005 • Part Works For
  
  834552000999 • View Detail • Free Shipping Eligible
  
  $62.75
- $62.75
  
  Qty
- v7071
- Bosch Aquastar 125B Gas Supply Pipe - 8700705552 - Non-returnable
  
  • LOC 3136 • Part Works For
  
  870070555299 • View Detail • Free Shipping Eligible
  
  $66.95
- $66.95
  
  Qty
- v7072
- Bosch Aquastar 125B Water Valve Pushrod - 87034062440 - Non-returnable
  
  • Old Part Number 87055001450 • LOC 3230 • Part Works For
  
  870340617999 • View Detail • Free Shipping Eligible
  
  $17.75
- $17.75
  
  Qty
- v7073
- Bosch Aquastar 125B Burner Assembly Washer - 8710103060 - Non-returnable
  
  • LOC 3571 • Part Works For
  
  871010306099 • View Detail • Free Shipping Eligible
  
  $4.95
- $4.95
  
  Qty
- v7076
- Bosch Aquastar 125B Water Valve Selector Screw - 8708500251 - Non-returnable
  
  • LOC 3536 • Part Works For
  
  870850025199 • View Detail • Free Shipping Eligible
  
  $36.95
- $36.95
  
  Qty
- v7077
- Bosch Aquastar Water Valve Slow Ignition Valve - 8708503063 - Non-returnable
  
  • LOC 3555 • Part Works For
  
  870850306999 • View Detail • Free Shipping Eligible
  
  $18.75
- $18.75
  
  Qty
- v7079
- Bosch Aquastar 125B Inlet Outlet Washer - 1/2 Inch - 8710103045 - Non-returnable
  
  • LOC 3570 • Part Works For
  
  871010304502 • View Detail • Free Shipping Eligible
  
  $4.75
- $4.75
  
  Qty
- v7080
- Bosch Aquastar Water Valve Rebuild Kit 125B Brass Water Valve - 7738001911 - WVKIT125BBWV - Non-returnable
  
  • Part Works For
  
  WVKT125BB992 • View Detail • Free Shipping Eligible
  
  $65.75
- $65.75
  
  Qty
- v7052
- Bosch Aquastar 125B Water Valve Governor - 8707402021KIT - Non-returnable
  
  • LOC 3465 • Part Works For
  
  870740202999 • View Detail • Free Shipping Eligible
  
  $53.75
- $53.75
  
  Qty
- v7056
- Bosch Aquastar 125B Water Valve Venturi - 8708205249 - Non-returnable
  
  • LOC 3530 • Part Works For
  
  870820524992 • View Detail • Free Shipping Eligible
  
  $14.95
- $14.95
  
  Qty
- v7060
- Bosch Aquastar 125B Piezo Electrode - 8708107002 - Non-returnable
  
  • Old Part Number 87081070020 • LOC 3480 • Part Works For
  
  870810700999 • View Detail • Free Shipping Eligible
  
  $18.75
- $18.75
  
  Qty
- v7074
- Bosch Aquastar 125B Main Burner LP w/ Washer - 8708120296 - Non-returnable
  
  • This Item is Drop Shipped by Bosch • Part Works For
  
  870812029699 • View Detail • Free Shipping Eligible
  
  $178.75
- $178.75
  
  Qty
- v7075
- Bosch Aquastar 125B Main Burner NG w/ Washer - 8708120298 - Non-returnable
  
  • LOC 3498 • Part Works For
  
  870812029899 • View Detail • Free Shipping Eligible
  
  $198.75
- $198.75
  
  Qty
- v7066
- Bosch Aquastar 125B Thermocable - 8747202209 - Non-returnable
  
  • LOC 3706 • Part Works For
  
  874720220999 • View Detail • Free Shipping Eligible
  
  $25.95
- $25.95
  
  Qty

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