California Residents WARNING: Cancer and Reproductive Harm
- Water pressure switch replacement
- Fits Pentair MiniMax CH pool and spa heater models 150 IID, 200, 250, 300, 350, 400
- Also fits Pentair MiniMax NT STD, NT LN, NT TSI pool/spa heater with 6800 and DDTC controller models 200, 250, 300, 400
- Compatible with Pentair UltraTemp and ThermalFlo Titanium pool/spa heat pumps
| Switch Type | Pressure |
| PSI Rating | 1 to 6 psi |
| Manufacturer | Pentair |
| Plumbing Connection Size | 1/4″ |
| Plumbing Connection Type | Male National Pipe Thread (mnpt) |
| Pressure Switch Amperage | 25A |
| Pole/Throw | Single Pole Normally Open (spno) |
| Pan Material | Plastic |
Exploded parts diagrams: This part is shown as item #20 on the Pentair ThermalFlo Heat Pump Replacement Parts; item #30 on the Pentair UltraTemp Heat Pump; item #36 on the Pentair ThermalFlo Titanium Heat Pump Replacement Parts; item #21 on the Pentair PowerMax 150 – 400 Model Heaters; item #15 on the Pentair MiniMax CH 150–400 Gas Heater; item #15 on the Pentair MiniMax CH 150 IID Gas Heater exploded parts diagrams.
🔧 Pentair ThermalFlo Heat Pump Replacement Parts – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Coil Reversing Valve, Pentair UltraTemp/ThermalFlo |
| – | Rubber Boot, Pentair Heat Pumps, Water Pressure Switch |
| – | Reversing Valve Kit, Pentair |
| 42 | 46-102-W008K42 |
| 5 | 46-102-W008K5 |
| – | _473034 |
| – | _473035 |
| – | _473432 |
| – | _473136 |
| – | _473135 |
| – | _473606 |
| 41 | 46-102-W008K41 |
| 40 | Contactor, Pentair Heat Pump, 24vac, 40amp |
| 39 | 46-102-W008K39 |
| 38 | _473423 |
| 37 | 46-102-W008K37 |
| 36 | 46-102-W008K36 |
| 35 | Control Board Assy, Pentair Ultratemp/Thermalflo Heat Pump |
| 34 | _473693 |
| 33 | _470147 |
| 31 | _473172 |
| 29 | _470284 |
| 28 | 46-102-W008K28 |
| 26 | 46-102-W008K26 |
| 25 | _473026 |
| 24 | 46-102-W008K24 |
| 23 | 46-102-W008K23 |
| 22 | Union Pvc 2"X2" |
| 21 | 46-102-W008K21 |
| 20 | Pressure Switch, Pentair Minimax NT/Minimax CH,1/4"mpt,SPNO ◀ this part |
| 19 | Nut,Pentair Purex Whisperflo/IntelliFlo,Var. Filters, 1/4-20 |
| 18 | 46-102-W008K18 |
| 17 | 46-102-W008K17 |
| 16 | Swtch 90/120 Lo Press |
| 15 | 46-102-W008K15 |
| 13 | _98219800 |
| 12 | 46-102-W008K12 |
| 11 | 46-102-W008K11 |
| 9 | _473223 |
| 8 | _470161 |
| 7 | 46-102-W008K7 |
| 6 | _473134 |
| 4 | Fan Motor, Pentair ThermalFlo Heat Pump, w/ Acorn Nut |
| 3 | _470441 |
| 2 | Fan Guard Sk050503-1 |
| 1 | 46-102-W008K1 |








