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Heater Parts → Mastertemp 125 Heater Parts

Mastertemp 125 Heater Parts

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Parts for:
Pentair Mastertemp® 125 Heaters

This Diagram Includes 3 Sections:

  • B - Water System

  • E - Burner System

  • W - Electrical System

Be Sure to Choose The Correct Part Number Based on the Correct Section
Model Number: 461058 Natural Gas
Model Number: 461059 Natural Gas
Model Number: 461060 Propane Gas
Model Number: 461061 Propane Gas
474971 | Tube Sheet Coil Assembly Kit
In Stock
W-1Tube Sheet Coil Assembly KitItem Number: 474971
Details:
Pentair Pool Products Part Number 474971
Used On Pentair Mastertemp 125 Heaters
  • Includes Item #3.  (NA, LP Series)
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Price: $734.03
474972 | Manifold Kit
In Stock
W-2Manifold KitItem Number: 474972
Details:
Pentair Pool Products Part Number 474972
Used On Pentair Mastertemp 125 Heaters
  • Includes Item #3, #4, #5, #6, #7, #9, #10, & #11
  • Item #8 and #13 Not included
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Price: $251.37
474973 | Coil Tubesheet Sealing O-Ring Kit
Currently Unavailable.
W-3Coil Tubesheet Sealing O-Ring KitItem Number: 474973
Details:
Pentair Pool Products Part Number 474973
Used On Pentair Mastertemp 125 Heaters
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Price: $42.77
I acknowledge this  is a special order item  
Water Pressure Switch
In Stock
W-8Water Pressure SwitchItem Number: 420010060S
Details:
Pentair Pool Products Item Number: 42001-0060S
Used On Pentair Mastertemp Heater Parts
Used On Pentair Mastertemp 125 Heater Parts
Used On Sta-Rite Max-E-Therm Heater Parts
Used On Pentair Eti 400 Heaters
Used On Pentair ETi 400 High Efficiency Heaters
Used On Pentair ETi 250 Heaters
View More Details
Price: $80.37
474989 | Thermal Regulator
Currently Unavailable.
W-12Thermal RegulatorItem Number: 474989
Details:
Pentair Pool Products Part Number 474989
Used On Pentair Mastertemp 125 Heaters
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Price: $59.17
I acknowledge this  is a special order item  
473715Z | Pressure Relief Valve
In Stock
W-13Pressure Relief ValveItem Number: 473715Z
Details:
Sta-Rite Pool Products Part Number 473715Z
50 PSI
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
Used On StaRite MaxETherm Heaters
View More Details
Price: $153.51
474974 | Union Kit
In Stock
W-14Union KitItem Number: 474974
Details:
Pentair Pool Products Part Number 474974
1.5 Inch
Used On Pentair Mastertemp 125 Heaters
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Price: $68.06
42001-0051S | Combination Gas Control Valve Kit
In Stock
B-1Combination Gas Control Valve KitItem Number: 420010051S
Details:
Sta-Rite Pool Products Part Number 42001-0051S
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $361.83
Union
Currently Unavailable.
B-2UnionItem Number: 384044097S
Details:
Pentair Pool Products Item Number: 38404-4097S
3/4"
Used On Pentair Mastertemp Heater Parts
Used On Pentair Mastertemp 125 Heater Parts
Used On Sta-Rite Max-E-Therm Heater Parts
Used On Pentair Eti 400 Heaters
Used On Pentair Ultratemp ETi Hybrid Heaters
Used On Pentair ETi 400 High Efficiency Heaters
Used On Pentair ETi 250 Heaters
Used On Pentair UltraTemp ETI Hybrid Heaters
View More Details
Price: $36.20
I acknowledge this  is a special order item  
474978 | Air Blower Kit Natural Gas
Currently Unavailable.
B-5Air Blower Kit Natural GasItem Number: 474978
Details:
Pentair Pool Products Part Number 474978
Used On Pentair Mastertemp 125 Heaters
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Price: $627.00
I acknowledge this  is a special order item  
474977 | Air Blower Kit Propane
Currently Unavailable.
B-5Air Blower Kit PropaneItem Number: 474977
Details:
Pentair Pool Products Part Number 474977
Used On Pentair Mastertemp 125 Heaters
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Price: $627.00
I acknowledge this  is a special order item  
474979 | Air Orifice Kit
In Stock
B-6Air Orifice KitItem Number: 474979
Details:
Pentair Pool Products Part Number 474979
Used On Pentair Mastertemp 125 Heaters
  • Includes Item Nos. 6, 7
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Price: $43.45
474952 | Combustion Chamber Gasket Kit
Currently Unavailable.
B-14Combustion Chamber Gasket KitItem Number: 474952
Details:
Pentair Pool Products Part Number 474952
Used On Pentair Mastertemp® Heaters
  • For Heaters Manufactured After 11/16/13 (New 9-bolt lid tub design).
Used On Pentair Mastertemp 125 Heaters
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Price: $45.85
I acknowledge this  is a special order item  
474990 | One Piece Metal Chamber Combustion Assembly
Currently Unavailable.
B-15One Piece Metal Chamber Combustion AssemblyItem Number: 474990
Details:
Pentair Pool Products Part Number 474990
Used On Pentair Mastertemp 125 Heaters
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Price: $326.08
I acknowledge this  is a special order item  
474958 | One Piece Metal Elbow Combustion Chamber Cover Assembly
Currently Unavailable.
B-20One Piece Metal Elbow Combustion Chamber Cover AssemblyItem Number: 474958
Details:
Pentair Pool Products Part Number 474958
Used On Pentair Mastertemp® Heaters
  • For Heaters Manufactured After 11/16/13 (New 9-bolt lid tub design).
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
  • For Heaters Manufactured after 11/16/13 (New 9-Bolt Lid Tub Design).
View More Details
Price: $399.73
I acknowledge this  is a special order item  
42002-0005S | Metal Vent Cover
In Stock
B-21Metal Vent CoverItem Number: 420020005S
Details:
Sta-Rite Pool Products Part Number 42002-0005S
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $128.47
474991 | Side Panel - Service
Currently Unavailable.
B-23Side Panel - ServiceItem Number: 474991
Details:
Pentair Pool Products Part Number 474991
Used On Pentair Mastertemp 125 Heaters
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Price: $118.33
I acknowledge this  is a special order item  
474992 | Side Panel - Manifold
Currently Unavailable.
B-24Side Panel - ManifoldItem Number: 474992
Details:
Pentair Pool Products Part Number 474992
Used On Pentair Mastertemp 125 Heaters
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Price: $168.63
I acknowledge this  is a special order item  
42002-0031Z | Heater Bottom
Currently Unavailable.
B-25Heater BottomItem Number: 420020031Z
Details:
Pentair Pool Products Part Number 42002-0031Z
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
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Price: $157.61
I acknowledge this  is a special order item  
474993 | Side Panel - Flue Stack
Currently Unavailable.
B-26Side Panel - Flue StackItem Number: 474993
Details:
Pentair Pool Products Part Number 474993
Used On Pentair Mastertemp 125 Heaters
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Price: $139.03
I acknowledge this  is a special order item  
42002-0041Z | J Box Cover
Currently Unavailable.
B-27J Box CoverItem Number: 420020041Z
Details:
Sta-Rite Pool Products Part Number 42002-0041Z
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
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Price: $18.13
I acknowledge this  is a special order item  
474292 | Panel Hardware
Currently Unavailable.
B-28Panel HardwareItem Number: 474292
Details:
Pentair Pool Products Part Number 474292
Includes: 11 ea screws, 11 ea clips and 8 wing-nuts
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
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Price: $22.64
I acknowledge this  is a special order item  
474981 | Gas Orifice Kit Natural Gas
Currently Unavailable.
B--Gas Orifice Kit Natural GasItem Number: 474981
Details:
Pentair Pool Products Part Number 474981
Used On Pentair Mastertemp 125 Heaters
  • Includes Item Nos. 3 and 4
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Price: $45.85
I acknowledge this  is a special order item  
474980 | Gas Orifice Kit Propane Gas
Currently Unavailable.
B--Gas Orifice Kit Propane GasItem Number: 474980
Details:
Pentair Pool Products Part Number 474980
Used On Pentair Mastertemp 125 Heaters
  • Includes Item Nos. 3 and 4
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Price: $45.85
I acknowledge this  is a special order item  
461063 | Conversion Kit Natural to Propane
Currently Unavailable.
B--Conversion Kit Natural to PropaneItem Number: 461063
Details:
Pentair Pool Products Part Number 461063
Used On Pentair Mastertemp 125 Heaters
  • Includes Item Nos. 3 and 4
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Price: $59.17
I acknowledge this  is a special order item  
461062 | Conversion Kit Propane to Natural
Currently Unavailable.
B--Conversion Kit Propane to NaturalItem Number: 461062
Details:
Pentair Pool Products Part Number 461062
Used On Pentair Mastertemp 125 Heaters
  • Includes Item Nos. 3 and 4
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Price: $59.17
I acknowledge this  is a special order item  
77707-0011 | Blower Adapter Plate Gasket Kit
Currently Unavailable.
B--Blower Adapter Plate Gasket KitItem Number: 777070011
Details:
Sta-Rite Pool Products Part Number 77707-0011
Used On Pentair Mastertemp® Heaters
  • Includes Item Nos. 8, 9, 10, 12
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
  • Includes Item Nos. 8, 9, 10, 12
View More Details
Price: $63.31
I acknowledge this  is a special order item  
474994 | Flameholder Kit
In Stock
B--Flameholder KitItem Number: 474994
Details:
Pentair Pool Products Part Number 474994
Used On Pentair Mastertemp 125 Heaters
  • Includes Item Nos. 10, 11, 12, 13
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Price: $147.90
77707-0008 | Insulation Kit
In Stock
B--Insulation KitItem Number: 777070008
Details:
Sta-Rite Pool Products Part Number 77707-0008
Used On Pentair Mastertemp® Heaters
  • Includes Item Nos. 13, 14, 16, 17, 18, 19
Used On Pentair Mastertemp 125 Heaters
  • Includes Item Nos. 13, 14, 16, 17, 18, 19
Used On Sta-Rite Max-E-Therm Heaters
  • Includes 13, 15, 23, 24, 25, 26
View More Details
Price: $153.27
474845 | Direct Air Intake Duct Kit
In Stock
B--Direct Air Intake Duct KitItem Number: 474845
Details:
Pentair Pool Products Part Number 474845
Used On Pentair Mastertemp 125 Heaters
View More Details
Price: $226.53
42002-0035Z | Heater Display Cover
In Stock
E-1Heater Display CoverItem Number: 420020035Z
Details:
Pentair Pool Products Part Number 42002-0035Z
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
View More Details
Price: $54.29
42001-0030S | Igniter Bracket
In Stock
E-2Igniter BracketItem Number: 420010030S
Details:
Sta-Rite Pool Products Part Number 42001-0030S
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $54.29
77707-0054 | Igniter and Igniter Gasket Kit
In Stock
E-3Igniter and Igniter Gasket KitItem Number: 777070054
Details:
Sta-Rite Pool Products Part Number 77707-0054
Includes Gasket
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $81.41
42001-0066S | Igniter Gasket
In Stock
E-4Igniter GasketItem Number: 420010066S
Details:
Sta-Rite Pool Products Part Number 42001-0066S
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $54.29
474368Z | Automatic Gas Shutoff Switch AGS
In Stock
E-5Automatic Gas Shutoff Switch AGSItem Number: 474368Z
Details:
Pentair Pool Products Part Number 474368Z
Used On Pentair Mastertemp 125 Heaters
View More Details
Price: $30.55
474367Z | High Limit Switch
In Stock
E-6High Limit SwitchItem Number: 474367Z
Details:
Pentair Pool Products Part Number 474367Z
Used On Pentair Mastertemp 125 Heaters
View More Details
Price: $30.55
Thermistor Water Sensor
In Stock
E-7Thermistor Water SensorItem Number: 420010053S
Details:
Pentair Pool Products Item Number: 42001-0053S
Used On Pentair Mastertemp Heater Parts
Used On Pentair Mastertemp 125 Heater Parts
Used On Sta-Rite Max-E-Therm Heater Parts
Used On Pentair Eti 400 Heaters
Used On Pentair ETi 400 High Efficiency Heaters
View More Details
Price: $77.76
Terminal Board
In Stock
E-8Terminal BoardItem Number: 420010056S
Details:
Pentair Pool Products Item Number: 42001-0056S
Used On Pentair Mastertemp Heater Parts
Used On Pentair Mastertemp 125 Heater Parts
Used On Sta-Rite Max-E-Therm Heater Parts
Used On Pentair Eti 400 Heaters
Used On Pentair ETi 400 High Efficiency Heaters
Used On Pentair ETi 250 Heaters
View More Details
Price: $54.29
32850-0099 | Firemans Switch Fuse
In Stock
E-9Firemans Switch FuseItem Number: 328500099
Details:
Pentair Pool Products Item Number: 32850-0099
Used On Pentair Mastertemp Heater Parts
Used On Pentair Mastertemp 125 Heater Parts
Used On Sta-Rite Max-E-Therm Heater Parts
Used On Pentair Eti 400 Heaters
Used On Pentair ETi 400 High Efficiency Heaters
Used On Pentair ETi 250 Heaters
View More Details
Price: $8.11
476223 | Ignition Control Module replaces 42001-0052S
Currently Unavailable.
E-10Ignition Control ModuleItem Number: 476223
Details:
Sta-Rite Pool Products Part Number 476223 replaces 42001-0052S
Fenwal 35-662944-013
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $304.88
I acknowledge this  is a special order item  
Dual Voltage Transformer
In Stock
E-11Dual Voltage TransformerItem Number: 420010107S
Details:
Pentair Pool Products Item Number: 42001-0107S
Used On Pentair Mastertemp Heater Parts
Used On Pentair Mastertemp 125 Heater Parts
Used On Sta-Rite Max-E-Therm Heater Parts
Used On Pentair Eti 400 Heaters
Used On Pentair ETi 400 High Efficiency Heaters
Used On Pentair ETi 250 Heaters
View More Details
Price: $66.41
42001-0061S | Air Flow Switch
In Stock
E-12Air Flow SwitchItem Number: 420010061S
Details:
Sta-Rite Pool Products Part Number 42001-0061S
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $134.63
461105 | Control Board Kit
In Stock
E-13Control Board KitItem Number: 461105
Details:
Sta-Rite Pool Products Part Number 461105 replaces  42001-0096S and 42002-0007S
NA, LP Series
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters

This 8 pin board replaces the now obsolete 42001-0096S which was a 9 pin board.
To install, with the pins on the right side when mounted, attach the ribbon cable starting from the bottom up, leaving the top 3 un-connected…
View More Details
Price: $523.86
42002-0034Z | Heater Top
In Stock
E-14Heater TopItem Number: 420020034Z
Details:
Pentair Pool Products Part Number 42002-0034Z
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Pentair Mastertemp 125 Heaters
View More Details
Price: $320.12
472610Z | Switch Membrane Pad
In Stock
E-15Switch Membrane Pad 5 ButtonItem Number: 472610Z
Details:
Sta-Rite Pool Products Part Number 472610Z
NA, LP Series
Used On Pentair Mastertemp® Heaters before 5/5/2021
Used On Pentair Mastertemp 125 Heaters before 5/5/2021
Used On Sta-Rite Max-E-Therm Heaters before 5/5/2021
View More Details
Price: $134.87
472610Z | Switch Membrane Pad
In Stock
E-15Switch Membrane Pad 6 ButtonItem Number: 461106
Details:
Sta-Rite Pool Products Part Number 461106
NA, LP Series
Used On Pentair Mastertemp® Heaters after 5/6/2021
Used On Pentair Mastertemp 125 Heaters after 5/6/2021
Used On Sta-Rite Max-E-Therm Heaters after 5/6/2021
View More Details
Price: $134.86
42002-0024S | Stack Flue Sensor
In Stock
E-16Stack Flue SensorItem Number: 420020024S
Details:
Sta-Rite Pool Products Part Number 42002-0024S
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $117.00
42001-0105S | Voltage Plug Kit
In Stock
E--Voltage Plug KitItem Number: 420010105S
Details:
Sta-Rite Pool Products Part Number 42001-0105S
120 Volt and 240 Volt
Used On Pentair Mastertemp® Heaters
Used On Pentair Mastertemp 125 Heaters
Used On Sta-Rite Max-E-Therm Heaters
View More Details
Price: $54.29

PVC and CPVC Fittings:
⚠️WARNING: These products can expose you to chemicals including Vinyl Chloride and Carbon Black, which are known to the State of California to cause cancer.  For more information go to www.P65Warnings.ca.gov

Products that contain O-Rings and Gaskets:
⚠️WARNING: These products can expose you to chemicals including Carbon Black, which is known to the State of California to cause cancer.  For more information go to www.P65Warnings.ca.gov

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