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Return to Bosch Tankless Water Heaters Repair Parts Main Page   For Trade Sales Click Here   For Retail Sales Click Here Products   Bosch Water Heaters   Electric Space Heaters   PEX Radiant Heat   Heat Timer Controls   Grundfos Pumps   Taco Pumps   Gas Boilers   Electric Boilers   Indirect Storage Tanks   Hydronic Heating Supplies   Z Vent Z Flex Venting   Myson Radiators - Hydronic   Tankless Water Heaters   Heat Exchangers   Plumbing PEX   Fantech Fans   Solar Heating   SharkBite Fittings   Copper Fittings   Schulter Ditra   Pompco Well Pumps   Help   Site Guide   Online Manuals   Register Site Map PH1148 Bosch Tankless Water Heater (For Models Prior to 2003) - 125B Repair Parts All Bosch Repair Parts are Non-Returnable Retail Prices are shown - once you have an account - then you can see Pro Pricing  Click here for more info! Bosch 125B Technical Support     Bosch 125B Service Bulletins Part # 8705406380 (870540623999) Bosch Aquastar 125B Heat Exchanger LOC 3305 - Part 8705406380 (old part number was 8705406235) - Non-returnable Retail Price: $299.75 Pro Price Not Shown Part # 8707002499 (870700249999) Bosch Aquastar 125B Water Valve Assembly (conversion kit) LOC 3365 - Part 8707002499 - Non-returnable Retail Price: $159.75 Pro Price Not Shown Part # 8707021090KIT (870701145999) Bosch Aquastar 125B Gas Valve NG - LOC 3381 - (Old Number was 8707011459) Part 8707021090KIT - Non-returnable Retail Price: $156.95 Pro Price Not Shown Part # 8707021091KIT (870701146399) Bosch Aquastar 125B Gas Valve LP LOC 3382 - Part 8707021091KIT - Non-returnable Retail Price: $169.75 Pro Price Not Shown Part # 8710103043 (871010304999) Bosch Aquastar 125B Water Connections Gasket LOC 3565 - Part 8710103043 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8703401165 (870340105999) Bosch Aquastar 125B Water valve set screw LOC 3220 - Part 8703401165 (Old Part Number was 8703401051) - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8700503053 (870050305999) Bosch Aquastar 125B Water Valve Diaphragm LOC 3080 - Part 8700503053 - Non-returnable Retail Price: $24.70 Pro Price Not Shown Part # 8700507059 (870050705999) Bosch Aquastar 125B Inlet Filter LOC 3110 - Part 8700507059 - Non-returnable Retail Price: $7.50 Pro Price Not Shown Part # 8707402021KIT (870740202999) Bosch Aquastar 125B Water valve governor LOC 3465 - Part 8707402021KIT - Non-returnable Retail Price: $30.00 Pro Price Not Shown Part # 8700703114 (870070311400) Bosch Aquastar 125B Water Elbow Fitting LOC 3120 - Part 8700703114 non-returnable Retail Price: $68.80 Pro Price Not Shown Part # 8700705294 (870070529999) Bosch Aquastar 125B Cold Water Pipe LOC 3130 - Part 8700705294 - Non-returnable Retail Price: $19.00 Pro Price Not Shown Part # 8700705556 (870070555999) Bosch Aquastar 125B Hot Water Pipe LOC 3140 - Part 8700705556 - Non-returnable Retail Price: $36.00 Pro Price Not Shown Part # 8708205249 (870820524999) Bosch Aquastar 125B Water Valve Venturi LOC 3530 - Part 8708205249 - Non-returnable Retail Price: $10.25 Pro Price Not Shown Part # 8702000219 (870040300999) Bosch Aquastar 125B Temp Adjustment Collar and Knob LOC 3075 - Part 8702000219 (old part number was 8700403008) - Non-returnable Retail Price: $9.75 Pro Price Not Shown Part # 8702000111 (870200011999) Bosch Aquastar 125B Temp Adjustment knob LOC 3205 - Part 8702000111 - Non-returnable Retail Price: $10.75 Pro Price Not Shown Part # 8718105051 (871810505999) Bosch Aquastar 125B Pilot Assembly NG or LP LOC 3585 - Part 8718105051 - Non-returnable Retail Price: $17.20 Pro Price Not Shown Part # 8708107002 (870810700999) Bosch Aquastar 125B Piezo Electrode LOC 3480 - Part 8708107002 - Non-returnable Retail Price: $12.95 Pro Price Not Shown Part # 8700507055 (870050755999) Bosch Aquastar 125B Pilot Air Screen LOC 3105 - Part 8700507055 - Non-returnable Retail Price: $6.45 Pro Price Not Shown Part # 8708200005 (870820000999) Bosch Aquastar 125B Pilot Injector Natural Gas LOC 3500 - Part 8708200005 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8748200173 (874820017999) Bosch Aquastar 125B Pilot Injector Propane Gas LOC 3610 - Part 8748200173 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8700707320 (870070732999) Bosch Aquastar 125B Pilot Tube LOC 3155 - Part 8700707320 - Non-returnable Retail Price: $7.55 Pro Price Not Shown Part # 8747202083 (874720208999) Bosch Aquastar 125B Thermocouple LOC 3600 - Part 87472020830 - Non-returnable Retail Price: $16.00 Pro Price Not Shown Part # 8747202209 (874720220999) Bosch Aquastar 125B Thermocable LOC 3605 - Part 8747202209 - Non-returnable Retail Price: $14.00 Pro Price Not Shown Part # 8707206040 (870720604999) Bosch Aquastar 125B Overheat Sensor (ECO) LOC 3405 - Part 8707206040 - Non-returnable Retail Price: $40.90 Pro Price Not Shown Part # 8707201012 (870720101999) Bosch Aquastar 125B Electromagnet LOC 3395 - Part 8707201012 - Non-returnable Retail Price: $31.20 Pro Price Not Shown Part # 8342400000 (834240000999) Bosch Aquastar 125B Regulator Natural Gas LOC 3000 - Part 8342400000 - Non-returnable Retail Price: $48.00 Pro Price Not Shown Part # 8345520000 (834552000999) Bosch Aquastar 125B Regulator Propane Gas LOC 3005 - Part 8345520000 - Non-returnable Retail Price: $45.00 Pro Price Not Shown Part # 8700705552 (870070555299) Bosch Aquastar 125B Gas Supply Pipe LOC 3136 - Part 8700705552 - Non-returnable Retail Price: $45.20 Pro Price Not Shown Part # 8705421025 (870542102599) Bosch Aquastar 125B Front Cover - Drop ship from mfg - Part 8705421025 - Non-returnable Retail Price: $103.00 Pro Price Not Shown Part # 8703406244 (870340617999) Bosch Aquastar 125B Water Valve Pushrod - LOC 3230 - (old part number was 87055001450) - 87034062440 - Non-returnable Retail Price: $10.00 Pro Price Not Shown Part # 8710103060 (871010306099) Bosch Aquastar 125B Burner Assembly Washer LOC 3571 - Part 8710103060 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8708120296 (870812029699) Bosch Aquastar 125B Main Burner LP w/ Washer LOC 3497 - Part 8708120296 - Non-returnable Retail Price: $136.50 Pro Price Not Shown Part # 8708120298 (870812029899) Bosch Aquastar 125B Main Burner NG w/ Washer - LOC 3498 - Part 8708120298 - Non-returnable Retail Price: $110.70 Pro Price Not Shown Part # 8708500251 (870850025199) Bosch Aquastar 125B Water Valve selector screw LOC 3536 - Part 8708500251 - Non-returnable Retail Price: $22.00 Pro Price Not Shown Part # 8708503063 (870850306999) Bosch Aquastar Water Valve Slow Ignition Valve - LOC 3555 - 8708503063 - Non-returnable Retail Price: $11.25 Pro Price Not Shown Part # 8709918202 (870991820299) Bosch Aquastar 125B Mounting Screws LOC 3561 - Part 8709918202 - Non-returnable Retail Price: $7.25 Pro Price Not Shown Part # 8710103045 (871010304500) Bosch Aquastar 125B Washer 1/2 Inch LOC 3570 - Part 8710103045 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # WVKIT125BBWV (WVKT125BB992) Bosch Aquastar Water Valve rebuild kit 125B Brass Water Valve LOC 6245 - Part WVKIT125BBWV (8703406244 and 8708503063 and DOWLUBE and 2 X 8710103043 and 2 X 8710103045 and 2 X 87034011650) - Non-returnable Retail Price: $21.75 Pro Price Not Shown Dow Lube (DOWLUBE00000) Package of Dow Lube - Loc 3615 - Non-returnable Retail Price: $2.95 Pro Price Not Shown Bosch 125B Technical Support     Bosch 125B Service Bulletins Return to Bosch Tankless Water Heaters Repair Parts Main Page Retail Prices are shown - once you have an account - then you can see Pro Pricing  Click here for more info!