The 4" soil pipe elbow shown in the photo is leaking at the top - water is gathering around the 'lip' where the elbow meets the vertical pipe. The vertical pipe is a vent, so the leak seems to indicate that water is backed up enough in the pipe to reach the top of the elbow. This is borne out by the toilet flush (which comes in to the horizontal pipe that goes off to the right in the photo) - the flush often sucks water out of the u-bend in the toilet.
Problem is I cannot get the pipe out of the elbow to check it, nor can I push it further in. I assumed it was a push fit but perhaps it is welded? Is there a trick to getting these things apart if it's possible at all?
Problem is I cannot get the pipe out of the elbow to check it, nor can I push it further in. I assumed it was a push fit but perhaps it is welded? Is there a trick to getting these things apart if it's possible at all?