Pentair Tridicator | ETi 250 / ETi 400 Heater | 475603
- In stock, ready to ship
- SKU:
- 475603
-
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About This Item
The Pentair Tridicator (475603) is the OEM replacement combination pressure and temperature gauge for the Pentair ETi series pool and spa heaters, including the ETi 250 and ETi® 400 models.
⚠️ IMPORTANT: HEATER SERVICE — LICENSED PROFESSIONAL REQUIRED
Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.
The Tridicator is a dual-function instrument that monitors both water pressure and water temperature simultaneously within the heater's plumbing circuit. A failed or inaccurate gauge can mask dangerous pressure buildups or incorrect operating temperatures, making timely replacement critical to safe heater operation. When your existing gauge reads erratically, fails to register, or shows visible damage, this OEM replacement restores accurate monitoring to factory specification.
Specifications
| Pentair Part Number | 475603 |
| Part Name | Tridicator |
| Quantity Included | Each (1) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | ETi 250 — ETi Series Pool and Spa Heater | ETi-250 | — |
| Pentair | ETi 250 — ETi Series Pool and Spa Heater | ETi250 | — |
| Pentair | ETi® 400 Heater — ETi Series | ETi400 | — |
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.
Pro Tip
Before ordering, locate the existing gauge on your ETi heater and confirm the part number stamped or printed on its body or housing matches 475603. The Tridicator's threaded connection size must also match your heater's port — consult your ETi installation manual to confirm the correct specification for your unit. Have a licensed pool professional handle the gauge swap; even a gauge replacement requires isolating water flow and verifying system pressure after reinstallation.
