PVC Drain Puzzle - Please Help Me Solve

[sl0flyer]

Hi All,

First time poster.. long time lurker : )

I've installed a new bathroom and brought the new drain (4" PVC) to tie into existing (4" PVC). My plan was to cut into the existing and put a 4" wye with furnco's on each side.

The issue is, the area that I need to tie into existing is 100% fittings.. I have no actual pipe to tie it into. I thought that my best option is to remove the middle wye (4x4x1.5) and replace with a new wye (4x4x4). I was going to use a 5" furnco and go over new and existing hubs, and gluing a small piece of 4" pvc inside the hub to ensure there are no inside lips. The issue is the 5" furnco I ordered is too big which foiled my plans. I realized this is not a proper way to do it, but seemed like the ONLY way. Accessibility is minimal and requires wiggling through 1' high crawlspace for 20' to get to this location.


There is no doubt I'll have to re-route a few of the existing 1.5" drains that you see in the pic.. but wondering what will require least amount of effort considering the accessibility issue.

What options do I have?

 

[Mr_David]

Long time lurker?? I guess you missed all those post that recommend against using Fernco couplings.
I'll help you out a little before I move on.

http://www.plumbingforums.com/forum/showthread.php?t=7681&highlight=fernco

http://www.plumbingforums.com/forum/showthread.php?t=7333&highlight=fernco

http://www.plumbingforums.com/forum/showthread.php?t=6521&highlight=fernco&page=2

Here's what you do to add another line. Cut all 3 wyes out of the stack.
First you probably only need a 3" for the new bathroom.
If it's already done in 4" than install a new 4" wye and a 4 x 3 wye to the stack.
then bring the 3 existing 1-1/2"" together and connect to the stack with the 4 x 3 wye or 4" wye instead of having 3 seperat wyes
. or maybe connect to the new4" line

Edit: Got all riled up about the fernco and I did not read the rest of the post until aftger the above comments.

I had to dig my way back to a kitchen line that the rats had chewed through a fernco.
Left a nasty mess under there. crawling sucks. cutting cast iron even worse

 

[sl0flyer]

Thank you! That sounds doable.

The question is, if I cut the three wyes out that you see in the pic, I'm still left with a fitting on each end (90 on bottom and 45 on top) with no pipe to connect to in between. In order to tie in properly, I would need at least a little pipe on each end right? Seems like I'll have the same issue

Anyone know of a magical fitting that i don't?

 

[sl0flyer]

Re-reading this today and thought I could simplify the problem a bit.

How do you tie into a stack that is made entirely of fittings?

Thanks everyone for looking at this, my wife is getting anxious and I have rough-inspection this coming week. Needless to say I'm under a bit of pressure.

 

[frodo]

cut all that crap out and redo it. their is no simple fix,

if you need to remove pipe from a fitting buy a ram bit, and a sawzall


all of that needs to be tied into a trunk line instead of a flag pole

 

[sl0flyer]

Thank you for the response

Again, I have to tie into existing fittings.. your response was spot on "if you need to remove pipe from a fitting buy a ram bit". I wasn't aware of that type of bit, but now found that 4" Pipe Hog is relatively affordable. I'm going to call around and see if I can track down one from big box stores (Menards, Home Depot, Lowes) so that I don't need to wait for shipping.

Greatly appreciate the help.

 

[frodo]

pasco, is the brand name for the ram bit. i do not know about big box, but a plumbing supply house has plumbing tools behind the counter

you will need a minimum 1/2'' chuck on a drill. dewalt sells a 3/8'' drill with 1/2'' chuck

http://www.dewalt.com/tools/drills-12-vsr-drills-dwd220.aspx


their is another way to remove the pipe from fitting.

 

[Jamesplumbing06]

Your chasing an empty rabbit hole trying to reuse fittings. I have taken a dremel and split the hubs and destroyed fittings. But your plumbed into a corner. All those 1.5 lines should come to a single fitting going into stack. I don't see any purple so if the generous fitting guy didn't use cleaner you can take a paint scraper heat gun and carefully peel the fitting away from pipe. Man the more I tell what I can do the more I think you might need someone that has the knowledge. Give us a bigger picture of what we ain't seeing that is so hampering you.does it really take a hairpin turn back to sewer? Bottom red scribbling.

 

[sl0flyer]

Thanks again everyone.. I'm nearly done, took all night. Decided to cut out the top two wyes and fit in a single new wye for new bath. I'm tying those three 1.5" lines into the bottom existing wye.

Had no choice but to reuse two of the existing fittings.. I tried chipping away as frodo recommended and it worked a bit, but I was too afraid of splitting the fittings. I then came in with my dremel and a grinder bit and ground out the old pipe out of existing fittings. At this point nearly everything is glued back together.. will have it complete in the morning and will post pictures

@Jamesplumbing06 - yup does hairpin turn out to sewer

 

[Jamesplumbing06]

Well your nearly done now but the hair pin turn maybe a future catch all