Main Header 070985

I am purchasing a main header, 070985, for a Pentair Heater. There is a small device that screws directly into the top of the header, and has an electrical connection - can you tell me which part I should order. The one that I removed from the old header is corroded, and I am thinking it might be good to replace it. What else do you think I will need?

Thanks,

Jack M. Bigler

Hello Jack - I believe you are referring to the pressure switch. Are there any specs or part numbers on the switch? Can you post a picture of the part?