💧 Thermal Regulator, Pentair MasterTemp 125
Made by Pentair, manufacturer part number 474989.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Pentair |
| Manufacturer part number | 474989 |
| Catalog description | Thermal Regulator, Pentair MasterTemp 125 |
California Residents WARNING: Cancer and Reproductive Harm
Exploded parts diagram: This part is shown as item #4 on the Pentair MasterTemp 125 Water System exploded parts diagram.
🔧 Pentair MasterTemp 125 Water System – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | 46-102-1008 |
| – | 46-102-1010 |
| – | 46-102-1015 |
| – | Gas Heater, LP, Pentair MasterTemp 125, E-Commerce |
| 6 | Union Package, Qty 2, Pentair Master Temp 125, 1-1/2"fbt |
| 5 | Pressure Relief Valve, Pentair Max-E-Therm, ASME |
| 4 | Thermal Regulator, Pentair MasterTemp 125 ◀ this part |
| 3 | Pressure Switch, Pentair MasterTemp |
| 2 | O-Ring Kit, Pentair MasterTemp 125, Coil/Tubesheet Sealing |
| 1 | Manifold Kit for Master Temp 125 |
🔧 Exploded diagram and parts
This part belongs to the Pentair MasterTemp 125 Water System assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 1 | ![]() |
Manifold Kit for Master Temp 125 | 474972 | 19 in stock | $288.21 | Add to cart |
| 2 | ![]() |
O-Ring Kit, Pentair MasterTemp 125, Coil/Tubesheet Sealing | 474973 | 7 in stock | $61.73 | Add to cart |
| 3 | ![]() |
Pressure Switch, Pentair MasterTemp | 42001-0060S | 10 in stock | $101.00 | Add to cart |
| 5 | ![]() |
Pressure Relief Valve, Pentair Max-E-Therm, ASME | 473715Z | 2 in stock | $192.96 | 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 |












