whether or not to chlorinate well
Within the next couple of weeks, I'll be replacing my well pump and am uncertain about the need for chlorinating the system.
The well is a 4" PVC with a submersible pump. It is 90' deep through sand with 50' of coverage in the well. Over the last 30 years, I've replaced the pump twice and never chlorinated the well (didn't know I was supposed to) and never suffered any ill-effects. Lucky, maybe? Now, I've read---repeatedly---that I should have shocked the system after replacing the pump. I've also read that the chlorine is not good for the bladder in the pressure tank (new, expensive tank), leaving me wondering just how to proceed.
Would adding chlorine to the well, lowering the pump up to the pitless adapter elbow and then pumping the well out onto the ground suffice? If I haven't pumped any water into the house after replacing the pump, why would there be a need to pump chlorinated water into the plumbing?