Thermowell, Lochinvar Boilers/Heaters, 3/8″ | TST2301
$29.10
| Manufacturer part number | TST2301 |
| Returns | 30-day returns – see our returns policy |
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💧 Thermowell, Lochinvar Boilers/Heaters, 3/8″
Made by Lochinvar, manufacturer part number TST2301. If your old part carries one of the cross-reference numbers further down, this is listed as its alternative.
🔄 Cross-reference part numbers
These part numbers are listed as alternatives for this part.
| Brand | Part number |
|---|---|
| Lochinvar, LLC | 100233264 |
Lochinvar Thermowell – Model TST2301
Professional Temperature Sensor Housing
We supply this specialized Lochinvar thermowell, specifically designed for Lochinvar boilers and heaters requiring 3/8″ sensor protection.
Product Overview
This precision-engineered thermowell is manufactured to exact Lochinvar specifications, ensuring perfect compatibility with their boiler and heater systems. It provides essential protection for temperature sensors while maintaining optimal thermal transfer.
Key Features
- Lochinvar OEM Compatibility
- 3/8″ Internal Diameter
- Purpose-Built Design
- Professional-Grade Construction
- Direct Replacement Part
Technical Details
This thermowell delivers:
- Precise Sensor Fit
- Reliable Protection
- Efficient Heat Transfer
- System-Specific Design
Exploded parts diagram: This part is shown on the Lochinvar EnergyRite Res Pool Heater Rpl Parts,ERN/L 150-400 exploded parts diagram.
🔧 Lochinvar EnergyRite Res Pool Heater Rpl Parts,ERN/L 150-400 – exploded parts diagram
The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Thermostat Assembly, Lochinvar Energyrite |
| – | Thermowell, Lochinvar Boilers/Heaters, 3/8" ◀ this part |
| – | Thermostat Assembly, Lochinvar Energyrite, Complete |
| 27 | Flange, Lochinvar, Water Connection, 2" |
| 26 | 46-203-W003K26 |
| 25 | Switch, Lochinvar Energyrite, Selector |
| 24 | Rocker Switch, Lochinvar Boilers/Heaters, On/Off |
| 18 | Drain Valve, Lochinvar EnergyRite |
| 14 | Heater Exchanger, Lochinvar EnergyRite Model 150 |
| 12 | 47-203-1035 |
| 11 | Hot Surface Igniter, Lochinvar Boilers/Heaters |
| 10 | 46-203-W003K10 |
| 8 | 47-203-1014 |
| 6 | Hi-Limit, Lochinvar Energyrite, 180 Degree, ER150/ER300 |
| 5 | K. Pressure Switch, Lochinvar Energyrite, Water, 1-5 psi |
| 4 | 46-203-W003K4 |
Specifications Table
| Specification | Detail |
|---|---|
| Manufacturer | Lochinvar |
| Model Number | TST2301 |
| Internal Diameter | 3/8 inch |
| Type | OEM Thermowell |
| Compatibility | Lochinvar Boilers/Heaters |
| Material | Professional Grade |
| Application | Temperature Sensor Protection |
| Design | System Specific |
Installation Compatibility
- Lochinvar Boiler Systems
- Lochinvar Heaters
- OEM Replacement Applications
- Direct-Fit Design
Performance Features
- Optimal Thermal Conductivity
- Protective Housing
- Precise Sensor Alignment
- Reliable Operation
🔧 Exploded diagram and parts
This part belongs to the Lochinvar EnergyRite Res Pool Heater Rpl Parts, ERN/L 150-400 assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 4 |  |
Air Pressure Switch, Lochinvar Energyrite Heaters | 100166156 | 1 in stock | $153.36 | Add to cart |
Complete thermostat assemblys
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
 |
Thermostat Assembly, Lochinvar Energyrite | 100170651 | 1 in stock | $307.55 | Add to cart |
Parts that go with this
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
 |
Silicone Based Lubricant 1oz 00150 | 00150 | 343 in stock | $5.26 | Add to cart |
 |
O-Ring Chart, Aladdin | MG1 | 17 in stock | $83.58 | Add to cart |
Applications
Specifically designed for:
- Lochinvar Boiler Systems
- Lochinvar Water Heaters
- Temperature Monitoring
- Sensor Protection
Note: Professional installation is recommended for optimal performance and proper sealing. Verify specific model compatibility before installation
| Brand | Lochinvar |
|---|---|
| Heater Part Type | Thermowell |
| Defining Attribute | 3/8" x 1/2" mpt |
| H Part# | 47-203-1000 |