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Orders placed after 12/16/24 may not arrive before Christmas.
Orders placed after 12/16/24 may not arrive before Christmas.

Boiler Replacement Elements

We carry a wide variety of boiler replacement elements used in equipment such as steam generators, electric boilers, pressure vessels, and sterilizers, including:

  • 2-1/2" Square Flange
  • 3" Square Flange
  • 4-1/2" Square Flange
  • 6" Diameter Round Flange (aka 2" NPS)

If you don't see what you're looking for, please call us at 1-724-872-5007 or e-mail us at rheinhold@thermcoil.com.

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  • 378F-1455-020: Sussman / Mr. Steam 39183F, 39183FSS Equivalent
    Save 15% Save %

    18KW, 480V, 4-1/2" Square Flange Incoloy Alloy Boiler Element

    $ 602.10
    $ 602.10 - $ 602.10
    $ 602.10
    $ 511.79
    $ 511.79 - $ 511.79
    $ 511.79
    7+ in stock

    Therm Coil No.: 378F-1455-020 Product Description 18KW @ 480V With 10-1/8" Immersion Length and 4-1/2" SQ. Steel Flange. Application: Replaceme...

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    $ 602.10
    $ 602.10 - $ 602.10
    $ 602.10
    $ 511.79
    $ 511.79 - $ 511.79
    $ 511.79
    Save 15% Save %
  • 378F-1455-045: Sussman / Mr. Steam 39183B, 39183BSS Equivalent
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    18KW, 208V, 4-1/2" Square Flange Incoloy Alloy Boiler Element

    $ 598.00
    $ 598.00 - $ 598.00
    $ 598.00
    $ 508.30
    $ 508.30 - $ 508.30
    $ 508.30
    3+ in stock

    Therm Coil No.: 378F-1455-045 Product Description 18KW @ 208V With 10-1/8" Immersion Length and 4-1/2" SQ. Steel Flange. Application: Replacemen...

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    $ 598.00
    $ 598.00 - $ 598.00
    $ 598.00
    $ 508.30
    $ 508.30 - $ 508.30
    $ 508.30
    Save 15% Save %
  • 378F-1455-025A: Sussman / Mr. Steam 39223F, 39223FSS Equivalent
    Save 15% Save %

    22.5KW, 480V, 4-1/2" Square Flange Incoloy Alloy Boiler Element

    $ 630.50
    $ 630.50 - $ 630.50
    $ 630.50
    $ 535.93
    $ 535.93 - $ 535.93
    $ 535.93
    Low Stock

    Therm Coil No.: 378F-1455-025A Product Description 22.5KW @ 480V With 15" Immersion Length and 4-1/2" SQ. Steel Flange. Application: Replaceme...

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    $ 630.50
    $ 630.50 - $ 630.50
    $ 630.50
    $ 535.93
    $ 535.93 - $ 535.93
    $ 535.93
    Save 15% Save %
  • 378F-1455-016: Sussman / Mr. Steam 39183C, 39183CSS Equivalent
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    18KW, 240V, 4-1/2" Square Flange Incoloy Alloy Boiler Element

    $ 555.00
    $ 555.00 - $ 555.00
    $ 555.00
    $ 471.75
    $ 471.75 - $ 471.75
    $ 471.75
    33+ in stock

    Therm Coil No.: 378F-1455-016 Product Description 18KW @ 240V With 10-1/8" Immersion Length and 4-1/2" SQ. Steel Flange. Application: Replaceme...

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    $ 555.00
    $ 555.00 - $ 555.00
    $ 555.00
    $ 471.75
    $ 471.75 - $ 471.75
    $ 471.75
    Save 15% Save %
  • 378F-1455-039: Sussman / Mr. Steam 391203F, 39203FSS Equivalent
    Save 15% Save %

    20KW, 480V, 4-1/2" Square Flange Incoloy Alloy Boiler Element

    $ 598.00
    $ 598.00 - $ 598.00
    $ 598.00
    $ 508.30
    $ 508.30 - $ 508.30
    $ 508.30
    2+ in stock

    Therm Coil No.: 378F-1455-039 Product Description 20KW @ 480V With 10-1/8" Immersion Length and 4-1/2" SQ. Steel Flange. Application: Replacemen...

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    $ 598.00
    $ 598.00 - $ 598.00
    $ 598.00
    $ 508.30
    $ 508.30 - $ 508.30
    $ 508.30
    Save 15% Save %
  • 378F-1455-009: Sussman / Mr. Steam 39123F, 39123FS Equivalent
    Save 15% Save %

    12KW, 480V, 4-1/2" Square Flange Incoloy Alloy Boiler Element

    $ 555.00
    $ 555.00 - $ 555.00
    $ 555.00
    $ 471.75
    $ 471.75 - $ 471.75
    $ 471.75
    6+ in stock

    Therm Coil No.: 378F-1455-009 Product Description 12KW @ 480V With 10-1/8" Immersion Length and 4-1/2" SQ. Steel Flange. Application: Replaceme...

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    $ 555.00
    $ 555.00 - $ 555.00
    $ 555.00
    $ 471.75
    $ 471.75 - $ 471.75
    $ 471.75
    Save 15% Save %
  • Model CES-18053: 18kW, 480V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Save 20% Save %

    Model CES-18053: 17kW, 480V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    9+ in stock

    Therm Coil Drawing No.: 378F-1500-008A      Therm Coil Model No.: CES-18053 Product Description 17 kW @ 480 V With 10-3/8" Immersion Length (C) ...

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    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Save 20% Save %
  • 24KW, 240V, 15" Immersion, 4-1/2" Square Flange Incoloy Alloy Boiler Element
    Save 15% Save %

    24KW, 240V 3-PH, 15" Immersion, 4-1/2" Square Flange Incoloy Alloy Boiler Element

    $ 630.50
    $ 630.50 - $ 630.50
    $ 630.50
    $ 535.93
    $ 535.93 - $ 535.93
    $ 535.93
    3+ in stock

    Therm Coil No.: 378F-1455-053 Product Description 24kW @ 240V With 15" Immersion Length and 4-1/2" SQ. Steel Flange. Application: Replacement e...

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    $ 630.50
    $ 630.50 - $ 630.50
    $ 630.50
    $ 535.93
    $ 535.93 - $ 535.93
    $ 535.93
    Save 15% Save %
  • Model PFA-ES-30053-2: Electro-Steam ES-30480-037 Equivalent 30kW @ 480V, 6" DIA. Round Flange (2" NPS) 36" Immersion Element
    Call for Availability

    Model PFA-ES-30053-2: Electro-Steam ES-30480-037 Equivalent 30kW @ 480V, 6" DIA. Round Flange (2" NPS) 36" Immersion Element

    $ 815.00
    $ 815.00 - $ 815.00
    $ 815.00
    $ 652.00
    $ 652.00 - $ 652.00
    $ 652.00
    Call for Availability

    Therm Coil Drawing No.: 378J-1004-037          Therm Coil Model No. PFA-ES-30053-2 Description   Used Within Steam Generators and Sterilizers....

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    $ 815.00
    $ 815.00 - $ 815.00
    $ 815.00
    $ 652.00
    $ 652.00 - $ 652.00
    $ 652.00
    Call for Availability
  • Model CES-20043: 20kW, 240V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-20043: 20kW, 240V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability

    Therm Coil Drawing No.: 378F-1500-014A      Therm Coil Model No.: CES-20043 NOTE: Please call us at 724-872-5007 for a quote on lead time and to ...

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    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability
  • Model CES-20023: 20kW, 208V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-20023: 20kW, 208V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability

    Therm Coil Drawing No.: 378F-1500-013A      Therm Coil Model No.: CES-20023 NOTE: Please call us at 724-872-5007 for a quote on lead time and to ...

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    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability
  • Model CES-18043: 18kW, 240V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-18043: 17kW, 240V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability

    Therm Coil Drawing No.: 378F-1500-009A      Therm Coil Model No.: CES-18043 NOTE: Please call us at 724-872-5007 for a quote on lead time and to ...

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    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability
  • Model CES-18033: 18kW, 346V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-18033: 18kW, 346V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 675.30
    $ 675.30 - $ 675.30
    $ 675.30
    $ 574.01
    $ 574.01 - $ 574.01
    $ 574.01
    Call for Availability

    Therm Coil Drawing No.: 378F-1500-005A      Therm Coil Model No.: CES-18033 NOTE: This is a specialty heater that replaces the 346V 17kW OEM unit...

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    $ 675.30
    $ 675.30 - $ 675.30
    $ 675.30
    $ 574.01
    $ 574.01 - $ 574.01
    $ 574.01
    Call for Availability
  • Model CES-12053: 12kW, 480V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-12053: 12kW, 480V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability

    Therm Coil Drawing No.: 378F-1500-002A      Therm Coil Model No.: CES-12053 NOTE: Please call us at 724-872-5007 for a quote on lead time and to ...

    View full details
    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability
  • Model CES-18023: 18kW, 208V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-18023: 17kW, 208V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability

    Therm Coil Drawing No.: 378F-1500-010A      Therm Coil Model No.: CES-18023 NOTE: Please call us at 724-872-5007 for a quote on lead time and to ...

    View full details
    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability
  • Model CES-12023: 12kW, 208V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-12023: 12kW, 208V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability

    Therm Coil Drawing No.: 378F-1500-011A      Therm Coil Model No.: CES-12023 Product Description 12 kW @ 208 V With 10-3/8" Immersion Length (C) ...

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    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability
  • Model CES-12043: 12kW, 240V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-12043: 12kW, 240V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability

    Therm Coil Drawing No.: 378F-1500-012A      Therm Coil Model No.: CES-12043 NOTE: Please call us at 724-872-5007 for a quote on lead time and to ...

    View full details
    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability
  • Model CES-12033: 12kW, 346V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element
    Call for Availability

    Model CES-12033: 12kW, 346V, 4-1/2" Square Flange Incoloy Alloy Boiler Replacement Element

    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability

    herm Coil Drawing No.: 378F-1500-003A      Therm Coil Model No.: CES-12033 NOTE: This is a specialty heater that replaces both the 346V and 380V ...

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    $ 751.00
    $ 751.00 - $ 751.00
    $ 751.00
    $ 600.80
    $ 600.80 - $ 600.80
    $ 600.80
    Call for Availability
  • 378F-1455-038A: Sussman / Mr. Steam 391203C, 39203CSS Equivalent
    Call for Availability

    20KW, 240V, 4-1/2" Square Flange Incoloy Alloy Boiler Element

    $ 598.00
    $ 598.00 - $ 598.00
    $ 598.00
    $ 508.30
    $ 508.30 - $ 508.30
    $ 508.30
    Call for Availability

    Please Call For Lead Time Quote: 1-724-872-5007 Therm Coil No.: 378F-1455-038A Product Description 20KW @ 240V With 10-1/8" Immersion Length and ...

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    $ 598.00
    $ 598.00 - $ 598.00
    $ 598.00
    $ 508.30
    $ 508.30 - $ 508.30
    $ 508.30
    Call for Availability

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