"The threaded part is "out of shape" so to speak like if it was heated".. i dont know whether op means the fitting, or the pump's discharge threads, or both.. so how could you?I think a deformed fitting can only be used once, am I right?
there is that possibility.. i previously asked what the cutin/cutout pressure was. op said pump was shutting off. could be set to high? power problem? could be something else. what is your professional opinion with the information provided so far?How about this possibility, the fitting has nothing to do with it and you (and the OP) need to find the cause of both pumps getting hot enough to deform PVC male fittings.
BTW.. i dont NEED to do anything. my water system works excellent. i'm just trying to help out someone whose having a pump problem by asking questions in hopes to get closer to a solution, as its a topic i'm somewhat familiar with. what are you doing?