On Tue, 25 Jun 2013 15:44:12 -0700, Oren wrote:

Put a short piece (12" of so) of old poly in the insert and use the
tape or "figure 8" until you get ready for new poly. Remove it for
the new poly. That will stop the flooding for now.

Hi Oren,

Ah, that's a good idea (I already have the raw materials for that!).

As for a more permanent fix, what do you think about me putting
one of these 3/4" slip-to-MHT (male hose thread?) fittings directly
onto the white-and-green part sticking out of the existing PVC elbow?

http://www3.picturepush.com/photo/a/...g/13410696.jpg

That seems to be a looser fit than a normal PVC pipe dry fit; but
with lots of "glue", I think it might work.

Is it possible to pry out that green endcap & just place the slip
fitting over the remaining white part? (Or do I need to cut off
the entire elbow and start again with the slip:slip coupling)?