💧 Water Pressure Switch Kit, Lochinvar EnergyRite Heater
Made by Lochinvar, manufacturer part number 100166256. If your old part carries one of the cross-reference numbers further down, this is listed as its alternative.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Lochinvar |
| Manufacturer part number | 100166256 |
| Switch Type | Pressure |
| PSI Rating | 1 to 5 psi |
| Manufacturer | Tridelta/Tecmark |
| Plumbing Connection Size | 1/8″ |
| Plumbing Connection Type | Male Pipe Thread (mpt) |
| Pressure Switch Amperage | 25A |
| Pole/Throw | Single Pole Double Throw (spdt) |
| Pan Material | Plastic |
| Catalog description | Water Pressure Switch Kit, Lochinvar EnergyRite Heater |
🔄 Cross-reference part numbers
These part numbers are listed as alternatives for this part.
| Brand | Part number |
|---|---|
| Lochinvar | PRS2406 |
| Lochinvar | PRS3406 |
Exploded parts diagram: This part is shown as item #6 on the Lochinvar EnergyRite Res Pool Heater Rpl Parts,ERN/L 152-402 exploded parts diagram.
🔧 Lochinvar EnergyRite Res Pool Heater Rpl Parts,ERN/L 152-402 – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Indoor Vent Adapter Kit, Lochinvar ER, Vertical, 6" OD |
| – | Heater, NG, Lochinvar EnergyRite ERN252A, ASME Cupro Nickel |
| – | Gas Heater, NG, Lochinvar EnergyRite ERN402, 400K BTU |
| – | Gas Heater, NG, Lochinvar EnergyRite ERN402A, 400K BTU, ASME |
| – | Gas Heater, NG, Lochinvar EnergyRite ERN202A, 199K BTU, ASME |
| – | Gas Heater, NG, Lochinvar EnergyRite ERN302, Poly, 300K BTU |
| – | Gas Heater, NG, Lochinvar EnergyRite ERN302A, ASME, 300K BTU |
| 30 | Flange, Lochinvar EnergyRite ASME, Htrs,Water Connection,2" |
| 29 | Gasket, Lochinvar EnergyRite ASME Heaters, Flange, 1-1/2" |
| 28 | Gasket, Lochinvar EnergyRite/2 ASME, Flange, Thick, 2" |
| 22 | Drain Valve, Lochinvar EnergyRite 152-402 |
| 16 | 46-203-W001K16 |
| 13 | Flame Sensor, Lochinvar, With Gasket |
| 12 | Spark Ignitor, Lochinvar EnergyRite Heater 152-402 |
| 11 | Integrated Ctrl Module, Lochinvar EnergyRite Heaters,152-252 |
| 9 | Inlet/Outlet Emersion Sensor, Lochinvar EnergyRite Heater |
| 8 | Sensor, Lochinvar EnergyRite Non-ASME, Hi-Limit, 1/4"mpt |
| 7 | Air Pressure Switch, Lochinvar, w/ Mounting Nuts |
| 6 | Water Pressure Switch Kit, Lochinvar EnergyRite Heater ◀ this part |
🔧 Exploded diagram and parts
This part belongs to the Lochinvar EnergyRite Res Pool Heater Rpl Parts, ERN/L 152-402 assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 7 | ![]() |
Air Pressure Switch, Lochinvar, w/ Mounting Nuts | 100166258 | 5 in stock | $58.22 | Add to cart |
| 9 | ![]() |
Inlet/Outlet Emersion Sensor, Lochinvar EnergyRite Heater | 100208553 | Available to order | $87.10 | |
| 11 | ![]() |
Integrated Ctrl Module, Lochinvar EnergyRite Heaters,152-252 | 100286274 | 3 in stock | $890.97 | Add to cart |
| 12 | ![]() |
Spark Ignitor, Lochinvar EnergyRite Heater 152-402 | 100165932 | 3 in stock | $81.90 | Add to cart |
| 13 | ![]() |
Flame Sensor, Lochinvar, With Gasket | 100165921 | Available to order | $56.48 | |
| 28 | ![]() |
Gasket, Lochinvar EnergyRite/2, Flange, Thick, 2" | 100208100 | 5 in stock | $32.42 | Add to cart |
| 29 | ![]() |
Gasket, Lochinvar EnergyRite Heaters, Flange, 1-1/2" | 100208754 | Available to order | $44.21 | |
| 30 | ![]() |
Flange, Lochinvar EnergyRite Heaters, Water Connection, 2" | 100288537 | 3 in stock | $349.26 | Add to cart |














