Poster #16,
I am pleased to see that you are learning from my posts - the idea is that besides helping the OP's that any DIY'er viewing my posts might also learn from them. Keep it up.
OP,
The Expanding bung does just that: it expands and it contracts simply by you holding the threaded rod and turning the wing nut.
Thanks for correcting me ref the one piece S-trap and pan.
Yes, but it's very stiff and if you are holding the threaded part and have your hands in the hole trying to stop it falling, and trying to tighten the wing nut at the same time - it simply doesn't work.
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