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Old 09-07-2016, 07:27 PM   #16
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Re: New Tub - Connecting Drain to Existing Plumbing


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Originally Posted by 123pugsy View Post
As mentioned earlier, it can be done.

But, you must be willing to place and remove and replace the tub a bunch of times to get everything perfect.
Yes, that's exactly what I was envisioning... A pain the a$$ for sure, but easier than the alternative...

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Originally Posted by 123pugsy View Post
I've used mock up pieces of pipe where I cut two slits in the sides so they could bottom out completely into the fittings, just as when they are glued up. Pipe is cheap and this can help to get the sizes of the pipes you need zeroed in.
Great idea! I was planning to do some trial and error to get the measurements just right, but this sounds a lot easier... Thank you!
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Old 09-07-2016, 10:20 PM   #17
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Re: New Tub - Connecting Drain to Existing Plumbing


The easiest way to do this is to glue up the trap and waste and overflow before the final tub set. This way, nothing is glued blindly. No need to slit or sand pipe. A couple dry fits and pencil marks for reference should do it.
When all is glued, set the tub in place and screw in the drain and attach the overflow nut. The trick is getting the gaskets in position- a little tacky adhesive helps here....
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Old 09-09-2016, 06:53 PM   #18
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Re: New Tub - Connecting Drain to Existing Plumbing


Thanks to everyone for the great advice! While I suspect I'll be coming back with more questions, I'll certainly be going into this project with a lot more confidence. Cheers!
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Old 09-18-2016, 02:53 PM   #19
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Re: New Tub - Connecting Drain to Existing Plumbing


Hey guys, I received the new tub, and with it came a couple of curveballs with regard to tying it to the existing plumbing:

-- I learned that the tub has an integral overflow, so I’ll most definitely need to move the P-trap so that it’s under the drain.

-- Looking at the existing plumbing (below), there’s a good likelihood that the “main” drain line will be under the drain.



-- The tub comes with a NIBCO ABS tray plug adapter, hub x NPSF thread. (Pic below.) My plumbing is obviously PVC.



So as I think about how to tackle the new challenges:

-- First, I’m thinking that I’ll try to get a PVC version of the tray plug adapter… It looks like Mueller makes one that might work… http://www.globalindustrial.com/p/pl...al-pipe-thread

-- As far as the existing drain line being in the way, can I just “offset” a section of it using 4 ells, and then tie into a new P-trap using a tee or wye in the offset section?

-- Question: the instructions that come with the tub say to attach the drain and tray adapter to the tub, prior to installing the tub. Since my plan is to do the install without access from below, I assume that there is no problem gluing the adapter to the plumbing and then screwing in the drain afterwards. (I mean, I know this is how it’s usually done in this situation; I just wanted to make sure that there was nothing unusual in this particular setup that would prevent a tight seal if I screw the drain in at the end… Does this sound OK?)

-- In the (hopefully unlikely) event that I can’t get a PVC version of the tray plug adapter that works, I suppose my options would be to use transitional cement to connect the ABS to PVC, or use a Fernco Qwik Tee to tie an ABS P-trap assembly to the “main” drain line. What do you think would be the best / most-permanent option? (Or would you handle it a different way entirely?)

Thanks!

Allen
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