Replacement Parts Diagram for Pentair ETi 400 Heater
Having a problem? Pick one to see the parts that usually fix it (optional)
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Most common fix Pentair 475604 Air Orifice | ETI 400 Heaters$54.99Notify me
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Most common fix Pentair Thermal Fuse ETI 400 Gas Pool Heater$74.99
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Most common fix Pentair Stack Flue Sensor For ETI 400 Gas Heater | Blue$59.99
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Most common fix Pentair 476000 Blower | ETI 400 Heaters$209.99
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$359.99
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$70.99
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$49.99
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Most common fix Pentair 475614 Outlet Plumbing Assembly | ETI 400 Heaters$269.99
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Most common fix Pentair 476002 Manifold For ETI 400 Heaters$329.99Notify me
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Most common fix Pentair High Limit Switch for MasterTemp And Max-E-Therm Heaters$52.99
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Most common fix Pentair Fireman's Switch Fuse 1.25 Amp MasterTemp Sta-Rite Max-E-Therm ETI 400 Gas Heaters$8.99
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Most common fix Pentair Terminal Board For MasterTemp And Max-E-Therm$39.99Notify me
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Most common fix Pentair Dual Voltage Transformer Kit For Max-E-Therm and MasterTemp Heaters | 115V/230V$65.99
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Most common fix Pentair 475978 Heater Fan Control Board | ETI 400 Heaters$123.99
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Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
Still not sure? Call (818) 765-4447 and we'll find it for you.
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Replacement Parts Diagram for Pentair ETi 400 Heater with Clickable Hotspots for Sensors, Thermistors, Control Boards, and Electrical Components
Use the interactive diagram above to identify replacement parts for your Pentair ETi 400 gas heater, then explore the listings below for compatibility, detailed specs, and best local pricing.
The 475601 Stack Flue Sensor monitors exhaust temperatures in ETi 400 heaters to ensure safe and efficient operation.
Control heater functions with the 475984 Membrane Pad, the external user interface designed for Pentair ETi 400 gas heaters.
Regulate water temperature accurately using the 42001-0053S Thermistor, compatible with ETi 400, MasterTemp, and Max-E-Therm models.
The 42001-0107S Dual Voltage Transformer Kit supplies 24V power and supports 115V/230V input for Pentair heater models.
Protect critical safety circuits with the 32850-0099 Fireman's Switch Fuse, a 1.25 amp fuse used across Pentair's ETi 400, MasterTemp, and Max-E-Therm series.
The 475978 Heater Fan Control Board regulates blower operation and fan control functions in ETi 400 heaters.
All Pentair ETi 400 heater replacement parts—sensors, thermistors, fuses, and control boards—are in stock with full diagram support and best local pricing.