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Pentair MasterTemp Heater Water System Replacement Parts (All BTU's)

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21. Zinc Plug 428-60 PS - U78-60ZPS

21. Zinc Plug 428-60 PS - U78-60ZPS

Corresponds with 21 in the diagram above.
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22. Pressure Relief Valve - 473715Z

22. Pressure Relief Valve - 473715Z

Corresponds with 22 in the diagram above.
23. 2 in. Union Adapter Package (Includes 2) - PKG188Z

23. 2 in. Union Adapter Package (Includes 2) - PKG188Z

Corresponds with 23 in the diagram above.
O-Ring Kit - 77707-0120

O-Ring Kit - 77707-0120

Not shown in the diagram above.  Manifold O-Ring Kit

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Bypass Access Plug (ASME) - 472648Z

Bypass Access Plug (ASME) - 472648Z

Not shown in the diagram above.  By-Pass Access Plug
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Heat Exchanger Kit (400 ASME) - 474096

Heat Exchanger Kit (400 ASME) - 474096

Not shown in the diagram above.  Kit Includes the Following: Insulation O-Ring Clamp Silicone Tube For ASME Heaters Manufactured after 3/24/09.
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Heat Exchanger Kit (400 ASME) - 474956

Heat Exchanger Kit (400 ASME) - 474956

Not shown in the diagram above.  Kit Includes the Following: Insulation O-Ring Clamp Silicone Tube For ASME Heaters Manufactured after 11/16/13. 
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Heat Exchanger Kit (400 HD ASME) - 474953

Heat Exchanger Kit (400 HD ASME) - 474953

Not shown in the diagram above.  Kit Includes the Following: Insulation O-Ring Clamp Silicone Tube For ASME Heaters Manufactured after 11/16/13. 
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Heat Exchanger Kit (400 ASME HD) - 474350

Heat Exchanger Kit (400 ASME HD) - 474350

Not shown in the diagram above.  Kit Includes the Following: Insulation O-Ring Clamp Silicone Tube For ASME Heaters Manufactured after 3/24/09.
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Heat Exchanger Kit (250 ASME) - 474097

Heat Exchanger Kit (250 ASME) - 474097

Not shown in the diagram above.  Kit Includes the Following: Insulation O-Ring Clamp Silicone Tube For ASME Heaters Manufactured after 3/24/09.
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Heat Exchanger Kit (250 ASME HD) - 474954

Heat Exchanger Kit (250 ASME HD) - 474954

Not shown in the diagram above.  Kit Includes the Following: Insulation O-Ring Clamp Silicone Tube For ASME Heaters Manufactured after 11/16/13. 
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Heat Exchanger Kit (250 ASME) - 474955

Heat Exchanger Kit (250 ASME) - 474955

Not shown in the diagram above.  Kit Includes the Following: Insulation O-Ring Clamp Silicone Tube For ASME Heaters Manufactured after 11/16/13. 
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Heat Exchanger Kit (250 ASME HD) - 474349

Heat Exchanger Kit (250 ASME HD) - 474349

Not shown in the diagram above.  Kit Includes the Following: Insulation O-Ring Clamp Silicone Tube For ASME Heaters Manufactured after 3/24/09.
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ASME Bypass Valve Kit (Old header design) - 460923

ASME Bypass Valve Kit (Old header design) - 460923

Not shown in the diagram above.  For ASME Heaters Manufactured Prior to 10/2012.  
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ASME Bypass Valve Tool Kit (Old header design) - 461007

ASME Bypass Valve Tool Kit (Old header design) - 461007

Not shown in the diagram above.  For ASME Heaters Manufactured Prior to 10/2012.
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Thermal Regulator Kit (includes Spring clip, ASME, Old header design) - 460924

Thermal Regulator Kit (includes Spring clip, ASME, Old header design) - 460924

Not shown in the diagram above.  For ASME Heaters Manufactured Prior to 10/2012.