well pressure

I have fixed everything on the house side, new pressure tank (set at 38psi), pressure gauge, pressure switch (40/60), checked all plumbing isn’t blocked up. I have good pressure for about 5 cycles of the pump kicking off at 60 psi and turning on at 40psi like it’s suppose to, but then all of a...

Low water pressure throughout the house. Well assembly is just over 20 years old. The well pressure tank had a ruptured bladder. Replaced. 36 gal. Air at 38psi. The pressure switch was bad also. Replaced. Also replaced the T pipe and the gauge. After replacements, same issue. Same psi...