Topic: pressure tanks gould model V100

will a pressure tank lose its pressure if i drain the tank with the
> power turned off. i want to remove a piece in the pipe that is part of
> the treatment system i have which i am replacing. it is between the
> pipe entering the house and the pressure tank.

Re: pressure tanks gould model V100

If the bladder in that tank is still good and not torn, the air should should stay in the tank above the bladder.  If after you drain the tank and is still feels like it has water in it, the tank is bad and should be replaced (with a better brand).  After draining, use a tire gauge to see if there is any pressure in the tank.