Find your parts diagram
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) 818-6559 and we'll find it for you.
Pentair ETi 400 Heater Replacement Parts Diagram
Interactive parts diagram
45 parts · 2 with cheaper aftermarket options. Tap a number on the diagram, or search by part number.
Scroll or pinch to zoom · drag to move
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Original (OEM) Pentair Heater Fan Control Board For ETI 400 Heaters$139.99
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Original (OEM) Pentair Membrane Pad ETI 400 Gas Pool Heater$85.99
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$64.99
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Not sold online Pentair air pressure switch
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Original (OEM) Pentair Thermal Fuse ETI 400 Gas Pool Heater$69.99
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Original (OEM) Pentair Stack Flue Sensor For ETI 400 Gas Heater | Blue$68.99
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Original (OEM) Pentair Spark Electrodes For ETI 400 Gas Heater$129.99
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Not sold online Pentair condensate assembly / float switch
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$399.99
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Not sold online Pentair heat exchanger screws
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Not sold online Pentair plug assembly, 120/240V
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Not sold online Pentair tridicator gauge
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Original (OEM) Pentair Air Orifice For ETI 400 Heaters$59.99
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Not sold online Pentair heater gasket kit
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Not sold online Pentair gas side panel
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Not sold online Pentair water manifold panel
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Not sold online Pentair control board panel
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Not sold online Pentair latch assembly
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$219.99
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Not sold online Pentair inlet plumbing assembly
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Original (OEM) Pentair Outlet Plumbing Assembly For ETI 400 Heaters$299.99
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Not sold online Pentair exhaust assembly
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Original (OEM) Pentair Terminal Board For MasterTemp And Max-E-Therm$49.99
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$71.99
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AftermarketSave 16% Swimables Water Pressure Switch For Pentair MasterTemp and Max-E-Therm Heaters | 42001-0060S$59.99
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Original (OEM) Pentair Dual Voltage Transformer Kit For Max-E-Therm and MasterTemp Heaters | 115V/230V$75.99
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Not sold online Pentair pressure relief valve
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Not sold online Pentair control cover
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Not sold online Pentair vent cap, exhaust
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Not sold online Pentair vent socket
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Not sold online Pentair TitanTough heat exchanger
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Not sold online Pentair burner
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Original (OEM) Pentair Blower For ETI 400 Heaters$226.99
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Not sold online Pentair gas control valve replacement kit
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Not sold online Pentair 3/4 in. gas union
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$59.99
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AftermarketSave 41% Swimables High Limit Switch for Pentair MasterTemp And Max-E-Therm Heaters | 42001-0063S$34.99
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Original (OEM) Pentair Manifold For ETI 400 Heaters$349.99
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Not sold online Pentair manifold-enclosure fasteners
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Original (OEM) Pentair Control Board ETI 400 Gas Pool Heater$209.99
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Original (OEM) Pentair Ignition Control Module For ETi 400 Heater$249.99
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Not sold online Pentair flame sensor
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Not sold online Pentair burner assembly
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Not sold online Pentair base door, gas side
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Not sold online Pentair base door, control side
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Not sold online Pentair heat exchanger union adapters kit
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No parts match.
Don't see your part? Ask us and we'll find it.
Also fits your Pentair ETi 400 Heater
Not shown on the diagram, but made for this pump.
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$5.99
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$81.99
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$39.99
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Original (OEM) Swimables Drain Plug With O-Ring for Pentair MasterTemp and Max-E-Therm Heaters | U178-920P$5.99
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Original (OEM) Pentair Water Bypass Assembly ETI 400 Gas Pool Heater$75.99
Fit guide
ETi 400 parts at a glance
Item numbers and part numbers come from Pentair's ETi 400 Heater replacement parts list. Some items appear on more than one drawing (for example 11 gaskets and 44 fasteners).
Sensors and switches
- Stack flue sensor blue, item 7
- 475601
- Thermal fuse white, item 6
- 475998
- Automatic gas shut-off switch 150°F
- 475985
- Water sensor thermistor item 28, not shown
- 42001-0053S
- High limit switch
- 42001-0063S
Boards
Not shown on the drawing
- Wire harness item 5
- 475996
- Spark electrode cables item 9
- 475982
- Air intake kit item 17
- 475971
- Drain plug item 42
- U178-920PZ
- Hold down bracket kit item 45
- 476004
- Propane gas orifice kit item 46
- 476072

























