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Old 05-24-2011, 04:57 PM   #1
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Fernco stack support


If I cut an ABS vent stack to add another tee , but I don't have enough "play" to move the stack up or down enough to get an ABS fitting in (there are a couple of existing branches above and below that would keep me from pushing it up or down) - but I could get a Fernco in there - would a Fernco be enough to support the weight of the stack above it after it's in place, or do I need to brace the stack above somehow? It's not a ton of weight (single story 3" ABS vent stack) - if I could move it I could lift it with one hand - just thinking about the fernco over time, maybe slipping, etc and I end up with a leaky vent. Is this a non issue? I'm maybe once again worried for nothing?

thanks


Last edited by rtoni; 05-24-2011 at 04:59 PM.
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Old 05-26-2011, 12:25 PM   #2
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Fernco stack support


got an answer from Fernco - the fittings are not intended to carry any load however by code the stack should be braced / supported regardless of fitting type (fercno, rigid, etc.). The stack is supported (near the base - below the proposed fitting location) so I guess if I cut it I have to add more support above the fitting.

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Old 05-26-2011, 04:50 PM   #3
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Fernco stack support


Definitely need support on that stack probably in the attic somewhere.

Next time support stack before cutting, always.
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Old 05-27-2011, 10:13 AM   #4
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Fernco stack support


Quote:
Originally Posted by COLDIRON View Post
Definitely need support on that stack probably in the attic somewhere.

Next time support stack before cutting, always.
thanks Coldiron - haven't cut it yet but if I do (before I do) I'll add some bracing above the area where I cut. Seen a few posts around talking about ways to do that. I did put a coupling in the stack right at the bottom plate where it drops thru the floor - cut the hole just big enough for pipe to slide thru but coupling stops against the plate - which holds everything up in it's current state. but as you say it probably would have made much more sense to do same in attic. Then i'd have no problem now. Hindsight is 20/20 (my DIY mantra).

fyi I'm just looking at some options for a temporary washer in the utility room (very close to where the stack is) while laundry room is under construction and this might be the way I hook in the standpipe. Another option is to go thru floor and tie into main drain (leave the stack alone) - another post of mine talking about that. standpipe trap location

Probably should have combined the threads. Anyway thanks for the feedback.

Last edited by rtoni; 05-27-2011 at 10:16 AM.
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