💧 Eaton Thermostat 275-3123-00
Made by Eaton, manufacturer part number 275-3123-00. It is listed for the equipment shown below, so check the model on your own unit against that list.
Thermostats Single pole rated at 25 amps with max temp rating at 107°F. Best results are obtained when the bulb is installed in a dry well or groove tube at or immediately before the heater. This is a safety device! If it is found to be out of calibration, do not attempt to perform a field adjustment! Replace bad thermostat with a new oneCapillary Length: 12″Bulb Thickness: 1/4″
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Eaton |
| Manufacturer part number | 275-3123-00 |
| Catalog description | Eaton Thermostat 275-3123-00 |
✅ Listed for
- 5.5kW/11.0kW Hydro-Quip HeatMax Electric Pool & Spa Heater
Eaton Thermostat 275-3123-00 Keeping you comfortable, protected and connected Mechanical hi-limits & thermostats from Eaton’s Crouse-Hinds Division are ran at 50/60hz and are used for heavy duty line voltage to control fan coils, motor starters, valves, contactors and circulator motors in heating and/or cooling systems.
Additional Information
| Type | Standard |
| Bulb Diameter | 1/4" |
| Cable Length | 12" |
Alternate Part Numbers
- 2-05-0055
- 275-3104-00
- 275-3116-00 (Invensys)
- 34-0121 (HydroQuip)
- 2-05-0055
- 55-1003
- 47-335-1057
🔧 Exploded diagram and parts
This part belongs to the Purex Islander / Manatee Electric Spa Heater assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 2 | ![]() |
Hi-Limit, Thermodisc, DPST, Screw Terminal, Surface Mount | 34-0058-K | 16 in stock | $90.11 | Add to cart |
| 3 | ![]() |
Coil Element, Canister, 5.5kW, 6", Titanium | 12-0600F-K | 4 in stock | $106.46 | Add to cart |
Exploded parts diagram: This part is shown as item #4 on the Purex Islander / Manatee Electric Spa Heater exploded parts diagram.
🔧 Purex Islander / Manatee Electric Spa Heater – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Flowtube Bottom Cover, Tropic Air Purex Islander/Manatee |
| 9 | Gasket, Tropic Air Islander/Manatee,Cover,3-5/8"ID,5-1/8"OD |
| 8 | 46-555-W001K8 |
| 7 | 47-365-1051 |
| 6 | Pressure Switch 3041, 25A, Tecmark, 1/8"Comp, SPNO |
| 5 | 46-555-W001K5 |
| 4 | Thermostat, Invensys, 1/4", 12", SPST, 25A ◀ this part |
| 3 | 46-555-W001K3 |
| 2 | Hi-Limit, Thermodisc, DPST, Screw Terminal, Surface Mount |
| 1 | Contactor, DP, 40A FLA, 230v |









