🔧 What this part is
Tecmark Pressure Switch, part number 4015P. The pressure switch proves water flow before the heater will fire.
✅ Check before you order
- The number on the old part should read 4015P, 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
Tecmark Pressure Switch Pressure Switch, Tecmark 4000 Series, SPDT, rated to 1hp, 1/8th npt, connection, 1-6 psi adjustable, EPDM diaphragm
Additional Information
Alternate Part Numbers
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