[CarPsyco84]

Rule #1, pipe ends need beads or any coupler with any clamp will blow it off.
Rule #2, T bolts work 10x better, last longer, and will give you less head aches, maybe not necessary if under 20psi.
Rule #3, what the coupler is made out of is important, specially on problem couplers... nice silicone couplers are still sticky when hot, rubber and junky ones expand, and get slippery and will slip off pipes.