I have metal springs which complement the ID & prevent a kink/collapse.
I rarely use them anymore & have acquired a finesse for the task.
I have friends who pressurize the pipe to 1 or 2 pounds, but I have never seen them do it.
I rarely use them anymore & have acquired a finesse for the task.
I have friends who pressurize the pipe to 1 or 2 pounds, but I have never seen them do it.