2 year old thread, but thought I'd keep it all together. What about using waterproof spray foam in the pipes, then cut off the ends when dry. For the T-junctions, plastic would be better if they are metal but not much you can do if metal. Maybe Silicone caulk before and after you insert the pipes? Thoughts?
(assuming anyone still cares)
Moved from here.
(assuming anyone still cares)
Moved from here.
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