The solution to the problem that it is difficult to rotate when the large-sized PVC ball valve is switched: remove the handle of the PVC ball valve, use an adjustable wrench or a fixed wrench to hold the valve core shaft, and try to turn it a little; Stuck the knob and unscrew it; you can also use a fuel "blowtor" to heat the screw part of the PVC ball valve body to about 100 degrees, and then turn it after it heats up; or you can try to use a hot air blower to heat the ball valve body around it, and then you can twist.
