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Bosch Aquastar 125B Water Heater Repair Parts - Post February 2003

Bosch Aquastar 125B Gas Tankless Water Heater Repair Parts for heaters produced after February 2003. Go to this chart if you are not sure - click here to be go this 125B 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 38 Products

View All Bosch BBT Products

- v7301
- Bosch Aquastar 125B Water Valve 1 Port - 8707002649 - Non-returnable
  
  • Old Part Number 87070026490 • LOC 3370 • Part Works For
  
  870700264999 • View Detail • Free Ground Shipping
  
  $219.75
- $219.75
  
  Qty
- v7300
- Bosch Aquastar 125B Heat Exchanger - 8705406380 - Non-returnable
  
  • Old Part Number was 8705406235 • LOC 3305 • Part Works For
  
  870540623990 • View Detail • Free Ground Shipping
  
  $399.75
- $399.75
  
  Qty
- v7322
- Bosch Aquastar 125B Regulator Natural Gas - 8342400000 - Non-returnable
  
  • LOC 3000 • Part Works For
  
  834240000990 • View Detail • Free Shipping Eligible
  
  $67.75
- $67.75
  
  Qty
- v13256
- Bosch Aquastar 125B Regulator Propane Gas - LOC 3005 - 7738000884 - Non-returnable
  
  • Old Part Number was 8345520000 • LOC 3005 • Part Works For
  
  834552000990 • View Detail • Free Shipping Eligible
  
  $62.75
- $62.75
  
  Qty
- v13257
- 125B Gas Valve NG - LOC 3381 - 7738002271- 8707021090 - Non-returnable
  
  • Old Part Numbers were 8707011459 & 8707021090KIT • LOC 3381 • Part Works For
  
  870701145990 • View Detail • Free Ground Shipping
  
  $245.75
- $245.75
  
  Qty
- v7330
- Bosch Aquastar 125B Gas Valve LP - 7738002283 - Non-returnable
  
  • LOC 3382 • Part Works For
  
  870701146390 • View Detail • Free Ground Shipping
  
  $268.75
- $268.75
  
  Qty
- v7331
- Bosch Aquastar 125B Main Burner LP w/ Washer - 8708120296 - Non-returnable
  
  • This Item is Drop Shipped by Bosch • Part Works For
  
  870812029690 • View Detail • Free Shipping Eligible
  
  $178.75
- $178.75
  
  Qty
- v7332
- Bosch Aquastar 125B Main Burner NG w/ Washer - 8708120298 - Non-returnable
  
  • LOC 3498 • Part Works For
  
  870812029890 • View Detail • Free Shipping Eligible
  
  $198.75
- $198.75
  
  Qty
- v7302
- Bosch Aquastar 125B Water Valve Pushrod - 8700306114 - Non-returnable
  
  • Old Part Number 87003061140 • LOC 3060 • Part Works For
  
  870030611999 • View Detail • Free Shipping Eligible
  
  $29.95
- $29.95
  
  Qty
- v7303
- Bosch Aquastar 125B Upper Joint Pipe Washer Kit - 8700103692 - Non-returnable
  
  • LOC 3008 • Part Works For
  
  870010369200 • View Detail • Free Shipping Eligible
  
  $12.75
- $12.75
  
  Qty
- v7304
- Bosch Aquastar 125B Water Connections Gasket - 8710103043 - Non-returnable
  
  • Old Part Number 87101030430 • LOC 3565 • Part Works For
  
  871010304990 • View Detail • Free Shipping Eligible
  
  $4.75
- $4.75
  
  Qty
- v7305
- Bosch Aquastar 125B Water Valve Set Screw - 8703401165 - Non-returnable
  
  • Old Part Number 8703401051 • LOC 3220 • Part Works For
  
  870340105990 • View Detail • Free Shipping Eligible
  
  $8.95
- $8.95
  
  Qty
- v7306
- Bosch Aquastar 125B Water Valve Diaphragm - 8700503053 - Non-returnable
  
  • Old Part Number 87005030530 • LOC 3080 • Part Works For
  
  870050305993 • View Detail • Free Shipping Eligible
  
  $42.75
- $42.75
  
  Qty
- v7307
- Bosch Aquastar 125B Inlet Filter Screen - 8700507001 - Non-returnable
  
  • Old Part Number 87005070010 • LOC 3095 • Part Works For
  
  870050700999 • View Detail • Free Shipping Eligible
  
  $6.75
- $6.75
  
  Qty
- v7308
- Bosch Aquastar 125B Volumetric Flow Governor - 8705705009 - Non-returnable
  
  • LOC 3345 • Part Works For
  
  870570500999 • View Detail • Free Shipping Eligible
  
  $30.75
- $30.75
  
  Qty
- v7309
- Bosch Aquastar 125B Water Valve Venturi - 8708205249 - Non-returnable
  
  • LOC 3530 • Part Works For
  
  870820524993 • View Detail • Free Shipping Eligible
  
  $14.95
- $14.95
  
  Qty
- v7310
- Bosch Aquastar 125B Water Elbow Fitting - 8700703114 - non-returnable
  
  • Old Part Number 87007031140 • LOC 3120 • Part Works For
  
  870070311401 • View Detail • Free Shipping Eligible
  
  $90.75
- $90.75
  
  Qty
- v7311
- Bosch Aquastar 125B Outlet Flex Hose - 87007031399 - Non-returnable
  
  • Old Part Number 8700703130 & 87007031390 • LOC 3125 • Part Works For
  
  870070313999 • View Detail • Free Shipping Eligible
  
  $62.95
- $62.95
  
  Qty
- v7312
- Bosch Aquastar 125B Cold Water Pipe - 8700705627 - Non-returnable
  
  • Old Part Number 87007056270 • LOC 3145 • Part Works For
  
  870070562999 • View Detail • Free Shipping Eligible
  
  $39.75
- $39.75
  
  Qty
- v7313
- Bosch Aquastar 125B Temp Adjustment Knob - 8702000111 - Non-returnable
  
  • Old Part Number 87020001110 • LOC 3205 • Part Works For
  
  870200011993 • View Detail • Free Shipping Eligible
  
  $15.75
- $15.75
  
  Qty
- v7314
- Bosch Aquastar 125B Temp Adjustment Collar and Knob - 8702000219 - Non-returnable
  
  • Old Part Number 8700403008 & 87020002190 • LOC 3075 • Part Works For
  
  870040300993 • View Detail • Free Shipping Eligible
  
  $25.95
- $25.95
  
  Qty
- v7315
- Bosch Aquastar 125B Pilot Assembly NG or LP - 8718105051 - Non-returnable
  
  • Does not include Pilot Injector • Old Part Number 87181050510 • 871810505990 • Part Works For
  
  871810505990 • View Detail • Free Shipping Eligible
  
  $32.75
- $32.75
  
  Qty
- v7316
- Bosch Aquastar 125B Piezo Electrode - LOC 3480 - 8708107002 - Non-returnable
  
  • Old Part Number 87081070020 • LOC 3480 • Part Works For
  
  870810700990 • View Detail • Free Shipping Eligible
  
  $16.75
- $16.75
  
  Qty
- v7317
- Bosch Aquastar 125B Pilot Injector Natural Gas - 8708200005 - Non-returnable
  
  • Old Part Number 87082000050 • LOC 3500 • Part Works For
  
  870820000990 • View Detail • Free Shipping Eligible
  
  $5.75
- $5.75
  
  Qty
- v7318
- Bosch Aquastar 125B Pilot Injector - Propane Gas - 8748200173 - Non-returnable
  
  • LOC 3610 • Part Works For
  
  874820017990 • View Detail • Free Shipping Eligible
  
  $7.75
- $7.75
  
  Qty
- v7319
- Bosch Aquastar 125B Thermocouple with Flue Gas Sensor - 8707206344 - Non-returnable
  
  • Old Part Number 870720634400 and 8707206074 • LOC 3425 • Part Works For
  
  870720634999 • View Detail • Free Shipping Eligible
  
  $101.75
- $101.75
  
  Qty
- v7320
- Bosch Aquastar 125B Overheat Sensor (ECO) - 8707206040 - Non-returnable
  
  • LOC 3405 • Part Works For
  
  870720604993 • View Detail • Free Shipping Eligible
  
  $64.75
- $64.75
  
  Qty
- v7333
- Bosch Aquastar 125B Water Valve Selector Screw - 8708500289 - Non-returnable
  
  • LOC 3537 • Part Works For
  
  870850028999 • View Detail • Free Shipping Eligible
  
  $50.75
- $50.75
  
  Qty
- v7335
- Bosch Aquastar 125B Inlet Outlet Washer - 1/2 Inch - 8710103045 - Non-returnable
  
  • LOC 3570 • Part Works For
  
  871010304503 • View Detail • Free Shipping Eligible
  
  $4.75
- $4.75
  
  Qty
- v7336
- Bosch Aquastar 125B Burner Assembly Washer - 8710103060 - Non-returnable
  
  • LOC 3571 • Part Works For
  
  871010306090 • View Detail • Free Shipping Eligible
  
  $4.95
- $4.95
  
  Qty
- v7337
- Bosch Aquastar Water Valve Rebuild Kit for 125B Poly Water Valve - 7738001913 - WVKIT125BPWV - Non-returnable
  
  • LOC 6200 • Part Works For
  
  WVK125BWV902 • View Detail • Free Shipping Eligible
  
  $59.75
- $59.75
  
  Qty
- v7338
- Bosch Aquastar Package of Dow Lube - DOWLUBE - Non-returnable
  
  • Loc 3615 • Part Works For
  
  DOWLUBE00001 • View Detail • Free Shipping Eligible
  
  $7.15
- $7.15
  
  Qty
- v7321
- Bosch Aquastar 125B Electromagnet - 8707201012 - Non-returnable
  
  • Old Part Number 87072010120 • LOC 3395 • Part Works For
  
  870720101993 • View Detail • Free Shipping Eligible
  
  $50.75
- $50.75
  
  Qty
- v7324
- Bosch Aquastar 125B Outlet Flex Hose Washer - 8700103658 - Non-returnable
  
  • LOC 3020 • Part Works For
  
  870010365803 • View Detail • Free Shipping Eligible
  
  $5.75
- $5.75
  
  Qty
- v7325
- Bosch Aquastar 125B Pilot Air Screen - 8700507055 - Non-returnable
  
  • Old Part Number 87005070550 • LOC 3105 • Part Works For
  
  870050755990 • View Detail • Free Shipping Eligible
  
  $5.95
- $5.95
  
  Qty
- v7326
- Bosch Aquastar 125B Gas Supply Pipe - 8700705552 - Non-returnable
  
  • LOC 3136 • Part Works For
  
  870070555290 • View Detail • Free Shipping Eligible
  
  $68.75
- $68.75
  
  Qty
- v7327
- Bosch Aquastar 125B Pilot Tube - 8710707166 - Non-returnable
  
  • Old Part Number 8700707320 • LOC 3161 • Part Works For
  
  870070732990 • View Detail • Free Shipping Eligible
  
  $39.75
- $39.75
  
  Qty
- v7328
- Bosch Aquastar 125B Water Valve Cover - 8705500101 - Non-returnable
  
  • LOC 3325 • Part Works For
  
  870550010103 • View Detail • Free Shipping Eligible
  
  $68.75
- $68.75
  
  Qty

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