I need some serious help here. I am DIY replacing a water pressure tank all the fittings and adding a backflow filter, my house uses CPVC past the water filter and PVC before; I have studied the cold welding of PVC/CPVC pipe. The general procedure as I understand it and for the most part have used to great effect
Square ends, remove burs, prime with purple primer let sit until it dries a little (2-5 minutes), apply cement to the male and female, join quickly, give a quarter turn and hold tight for 30 seconds, and above all only do 1 joint at a time; and then I let rest for 6+ hours before putting it under pressure. This works great.. Until. THE LAST JOINT! I have done this damn joint 3 times over now (the joint will invariably leak under pressure). It is a simple one, CPVC with a coupler to close the loop, however there is NO way to make the ¼ twist with the last joint as everything is fixed in place, so I thought okay maybe the last two joints have to be done simultaneously (each side of the coupler) then I could just twist the coupler and that would do the ¼ twist on both ends, well this breaks the prime directive but maybe the last joint requires a special case, nope that ended in tragedy! what happened was one end froze before I could do complete insertion and hence incomplete connection!
Any help or advice would be greatly appreciated!
Square ends, remove burs, prime with purple primer let sit until it dries a little (2-5 minutes), apply cement to the male and female, join quickly, give a quarter turn and hold tight for 30 seconds, and above all only do 1 joint at a time; and then I let rest for 6+ hours before putting it under pressure. This works great.. Until. THE LAST JOINT! I have done this damn joint 3 times over now (the joint will invariably leak under pressure). It is a simple one, CPVC with a coupler to close the loop, however there is NO way to make the ¼ twist with the last joint as everything is fixed in place, so I thought okay maybe the last two joints have to be done simultaneously (each side of the coupler) then I could just twist the coupler and that would do the ¼ twist on both ends, well this breaks the prime directive but maybe the last joint requires a special case, nope that ended in tragedy! what happened was one end froze before I could do complete insertion and hence incomplete connection!
Any help or advice would be greatly appreciated!
