🔧 What this part is
Water Pressure Switch, Lochinvar Energyrite, 1-5 psi, part number 100208394. The pressure switch proves water flow before the heater will fire.
✅ Check before you order
- The number on the old part should read 100208394, or the maker’s equivalent.
- Not sure? Send us a photo of the old part and any number on it, and we will tell you whether this is the one.
📌 Also on this listing
| 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 |



