I am going to cut my horizontal branch from a vertical 2-3" wye for a new counter sink drain. I am thinking use two threaded adapters (see the photo please) in the horizontal line after the vertical wye for future modification. is it allowed?
Again, it would not be the best way to do it, and whether you can even use the cleanout depends on whether it is a cleanout tee, or a plugged female adapter.
Female pvc fittings can split eventually if you overtighten the male or there's any long-term tension on it; or, it could last forever. Safer to cut it off and use a coupling.
I'm not sure how else you expected the clean-out to be installed into the wye...
It was never going to be installed in a way that would allow you to cut the threaded bit off and attach a coupling.
Instead of buying a fancy tool, just replace the whole wye...
Why would someone buy a specialty tool that they will only use once, when they could simply cut and glue in a new fitting?
If you're a pro and you expect to use a tool 100 times it makes sense.
Is replacing a wye really a large task for you?
That depends on where you live, and how far away the specialty one-time-use tool is as well as the premium you might be charged for it.
I could have done this in the time between the photo above being posted and your last comment, the fittings are easy to come by and cheap enough.
Well in that case the easiest way is to hire a plumber from Florida.
Ok thanks for all of the advise, but let me clear-up a few things.These fittings are all 4"-do they make a 4" fitting saver? Secondly, that 4x2x4 wye butts-up to a 4x4x4 wye; you can see the vertical stack going down in bottom part of the photo; what might a 4" pasco fitting saver cost? Why wouldn't the hose clamp help keep the hub from splitting? I would assume glueing in the adapter is out of the question
This is awkward, but...
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