May not help much Redsy,but I always use glue on both the pipe and the coupling. There's a lot less chance of a void in the joint that way.
Another thing I do sometimes is use a primer/cleaner on the conduit before I apply the glue. I'm sure someone will say primer isn't listed for use with conduit,but I've never seen it cause a problem,and it sure makes a heckuva joint.
Russell
