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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 PH1155 Bosch Tankless Water Heater - 125X 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 125X Technical Support     Bosch 125X Service Bulletins Part # 8705406380 (870540623999) Bosch Aquastar 125X Heat Exchanger LOC 3305 - Part 8705406380 (old part number was 8705406235) - Non-returnable Retail Price: $299.75 Pro Price Not Shown Part # 8707002810 (870700281000) Bosch Aquastar 125X Water Valve Assembly (conversion kit) LOC 3375 - (Old Number was 8707002810) Part 8707002534 - Non-returnable Retail Price: $189.95 Pro Price Not Shown Part # 8703406244 (870340617999) Bosch Aquastar 125X Water Valve Pushrod LOC 3230 - Part 87055001450 (old part number was 8703406244 or 8703406178) - Non-returnable Retail Price: $10.00 Pro Price Not Shown Part # 8707402015 (870740201500) Bosch Aquastar 125X Volumetric Water Governor - LOC 3460 - Part 8707402015 - Non-returnable Retail Price: $24.00 Pro Price Not Shown Part # 8703401165 (870340105999) Bosch Aquastar 125X Water valve set screw LOC 3220 - Part 8703401165 (old part number was 8703401051) - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8710103043 (871010304999) Bosch Aquastar 125X Water Connections Gasket LOC 3565 - Part 8710103043 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8700503053 (870050305999) Bosch Aquastar 125X Water Valve Diaphragm LOC 3080 - Part 8700503053 - Non-returnable Retail Price: $24.70 Pro Price Not Shown Part # 8700507059 (870050705999) Bosch Aquastar 125X Inlet Filter LOC 3110 - Part 8700507059 - Non-returnable Retail Price: $7.50 Pro Price Not Shown Part # 8708205249 (870820524999) Bosch Aquastar 125X Water Valve Venturi LOC 3530 - Part 8708205249 - Non-returnable Retail Price: $10.25 Pro Price Not Shown Part # 8700703114 (870070311400) 125X Water Elbow Fitting LOC 3120 - Part 8700703114 non-returnable Retail Price: $68.80 Pro Price Not Shown Part # 8700705294 (870070529999) Bosch Aquastar 125X Cold Water Pipe LOC 3130 - Part 8700705294 - Non-returnable Retail Price: $19.00 Pro Price Not Shown Part # 8700705556 (870070555999) Bosch Aquastar 125X Hot Water Pipe LOC 3140 - Part 8700705556 - Non-returnable Retail Price: $36.00 Pro Price Not Shown Part # 8702000111 (870200011999) Bosch Aquastar 125X Temp Adjustment knob LOC 3205 - Part 8702000111 - Non-returnable Retail Price: $10.75 Pro Price Not Shown Part # 8702000219 (870040300999) Bosch Aquastar 125X 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 # 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 # 8708105491 (870810549100) Bosch Aquastar 125X Pilot Assembly LP LOC 3475 - Part 8708105491 - Non-returnable Retail Price: $24.70 Pro Price Not Shown Part # 870820006 (870820006900) Bosch Aquastar 125X Pilot Injector Natural Gas LOC 3510 - Part 8708200069 - Non-returnable Retail Price: $6.45 Pro Price Not Shown Part # 8708200312 (870820031200) Bosch Aquastar 125X Pilot Injector Propane Gas LOC 3515 - Part 8708200312 (old part number was 8748200312) - Non-returnable Retail Price: $6.45 Pro Price Not Shown Part # 8700707349 (870070734900) Bosch Aquastar 125X Pilot Tube LOC 3165 - Part 8700707349 - Non-returnable Retail Price: $12.95 Pro Price Not Shown Part # 8700103173 (870010317300) Bosch Aquastar 125X Pilot Tube Gasket LOC 3015 - Part 8700103173 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8700205120 (870020512099) Bosch Aquastar 125X Electrovalve O-Ring LOC 3040 - Part 8700205120 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8708501249 (870850124900) Bosch Aquastar 125X Pilot Electrovalve LOC 3540 - Part 8708501249 - Non-returnable Retail Price: $49.50 Pro Price Not Shown Part # 8708501250 (870850125000) Bosch Aquastar 125X Burner Electrovalve LOC 3545 - Part 8708501250 - Non-returnable Retail Price: $54.80 Pro Price Not Shown Part # 87181070670 (870810700600) Bosch Aquastar 125X Piezo Electrode LOC 3485 - Part 8708107006 - Non-returnable Retail Price: $10.75 Pro Price Not Shown Part # 8708107007 (870810700700) Bosch Aquastar 125X Flame Sensor Rod LOC 3490 - Part 8708107007 - Non-returnable Retail Price: $10.75 Pro Price Not Shown Part # 8707207011 (870720701100) Bosch Aquastar 125X Electronic Ignition Box LOC 3435 - Part 8707207011 - Non-returnable Retail Price: $93.00 Pro Price Not Shown Part # 8707206040 (870720604999) Bosch Aquastar 125X Overheat Sensor (ECO) LOC 3405 - Part 8707206040 - Non-returnable Retail Price: $40.90 Pro Price Not Shown Part # 8707200014 (870720001400) Bosch Aquastar 125X On/Off Switch LOC 3390 - Part 8707200014 - Non-returnable Retail Price: $12.95 Pro Price Not Shown Part # 8707305001 (870730500100) Bosch Aquastar 125X LED Control LOC 3450 - Part 8707305001 - Non-returnable Retail Price: $45.00 Pro Price Not Shown Part # 8700505062 (870050506200) Bosch Aquastar 125X Battery Box LOC 3090 - Part 8700505062 - Non-returnable Retail Price: $11.00 Pro Price Not Shown Part # 8707200007 (870720000700) Bosch Aquastar 125X Microswitch LOC 3385 - Part 8707200007 - Non-returnable Retail Price: $26.90 Pro Price Not Shown Part # 8342400000 (834240000999) Bosch Aquastar 125X Regulator Natural Gas LOC 3000 - Part 8342400000 - Non-returnable Retail Price: $48.00 Pro Price Not Shown Part # 8345520000 (834552000999) Bosch Aquastar 125X Regulator Propane Gas LOC 3005 - Part 8345520000 - Non-returnable Retail Price: $45.00 Pro Price Not Shown Part # 8704401035 (870440103599) Bosch Aquastar 125X Set of Cables complete LOC 3236 - Part 8704401035 - Non-returnable Retail Price: $53.00 Pro Price Not Shown Part # 8705421255 No Image Available (870542125599) Bosch Aquastar 125X Front Cover LOC 3321 - Drop ship from mfg - Part 8705421255 - Non-returnable Retail Price: $164.00 Pro Price Not Shown Part # 8707011729 (870701172999) Bosch Aquastar 125X Gas valve NG - LOC 3660 - Part 8707011729 - Non-returnable Retail Price: $240.00 Pro Price Not Shown Part # 8707011730 (870701173099) Bosch Aquastar 125X Gas valve LP - Part 8707011730 - Non-returnable Retail Price: $240.00 Pro Price Not Shown Part # 8708120296 (870812029699) Bosch Aquastar 125X Main Burner LP w/ Washer LOC 3497 - Part 8708120296 - Non-returnable Retail Price: $136.50 Pro Price Not Shown Part # 8708120298 (870812029899) Bosch Aquastar 125X Main Burner NG w/ Washer LOC 3498 - Part 8708120298 - Non-returnable Retail Price: $110.70 Pro Price Not Shown Part # 8708500251 (870850025199) Bosch Aquastar 125X 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 # 8708504021 (870850402199) Bosch Aquastar 125X Diaphragm Switch NG LOC 3556 - Part 8708504021 - Non-returnable Retail Price: $127.90 Pro Price Not Shown Part # 8708504049 (870850404999) Bosch Aquastar 125X Diaphragm Switch LP - LOC 3557 - Part 8708504049 - Non-returnable Retail Price: $127.90 Pro Price Not Shown Part # 8710103045 (871010304500) Bosch Aquastar 125X Washer 1/2 Inch LOC 3570 - Part 8710103045 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # 8710103060 (871010306099) Bosch Aquastar 125X Burner Assembly Washer LOC 3571 - Part 8710103060 - Non-returnable Retail Price: $5.35 Pro Price Not Shown Part # WVKIT125X (WVKIT125XBW2) Bosch Water Valve rebuild kit 125X - LOC 6225 - Part WVKIT125X(8703406244 and 8708503063 and 8707402015 and DOWLUBE and 2 X 8710103043 and 2 X 8710103045 and 2 X 87034011650 - Non-returnable Retail Price: $46.00 Pro Price Not Shown Dow Lube (DOWLUBE00000) Package of Dow Lube - Loc 3615 - Non-returnable Retail Price: $2.95 Pro Price Not Shown Bosch 125X Technical Support     Bosch 125X 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!