My 37 year old well pump is still hanging in!! I opened up the well cap earlier today and blew her some kisses and whispered some sweet nothings down the well!! ❤️
If you open your well cap, and see ants, see
https://terrylove.com/forums/index.php?threads/blocking-tiny-ants-in-well-cap.100548/ That reminds me that I sanitized almost 3 years ago. Might go another year or two.
Regarding sanitizing, I guess that there is the possibility that sanitizing could trigger your pump to fail. I have not heard of that happening.
Do you know your pump info and what pitless you have? If so, maybe tape the data to the wall near the pressure tank. Do you know who installed your pump? If you don't have the pump/pitless info, you might contact them in case they retire and records get lost.
When I had well work done (demolish pit and install pitless May 2014), the helper slapped their sticker over the existing sticker of who had done the previous work. Action item: protect your existing sticker if you get well work down by somebody else. The earlier well company was booked up when I decided to go from pit to pitless. The new company did good work, other than covering up the competitor's sticker. The pump and pressure tank had been put in Nov 2002, and I had the same pump put back down when the pitless was installed. So 22+ years on the Sta-Rite pump and Flexcon Challenger PC144R pressure tank. I think about what replacements I would want, but they will control the timing.