Ask Experts Questions for FREE Help !
Ask
    jk47's Avatar
    jk47 Posts: 6, Reputation: 1
    New Member
    		  
    #1

    Jul 13, 2005, 07:45 AM
    Combo Wye and 1/8th Bend / Venting Question
    Hello. I'm installing a toilet/lav/shower in my basement (concrete slab).

    The toilet will drain through a 3 foot long 4" PVC pipe @ 1/4" per foot and tee into the existing vertical 4" cast iron main, which is vented through the roof.

    The lav will drain through a 4 foot long 2" cast iron main, which is vented through the roof.

    The lav will drain through a 4 foot long 2" per foot and wye into the toilet's 4" PVC pipe. The lav will be vented through the roof via a 2" PVC pipe.

    The shower will drain through a 4 foot long 2" per foot and wye into the toilet's 4" per foot and tie into the lav's 2" PVC via a combo wye and 1/8th bend fitting.

    My questions are:
    1) Can a combo wye and 1/8th bend fitting be used in a vertical application as shown in the sketch?
    2) Will the shower and toilet be wet vented by the lav's 2" PVC pipe that runs to the roof?

    I would greatly appreciate any help and advice. Thank you.
    Attached Images
     
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Jul 13, 2005, 11:14 AM
    Quote Originally Posted by jk47
    Hello. I'm installing a toilet/lav/shower in my basement (concrete slab).

    The toilet will drain through a 3 foot long 4" PVC pipe @ 1/4" per foot and tee into the existing vertical 4" cast iron main, which is vented through the roof.

    The lav will drain through a 4 foot long 2" PVC pipe @ 1/4" per foot and wye into the toilet's 4" PVC pipe. The lav will be vented through the roof via a 2" PVC pipe.

    The shower will drain through a 4 foot long 2" PVC pipe @ 1/4" per foot and tie into the lav's 2" PVC via a combo wye and 1/8th bend fitting.

    My questions are:
    1) Can a combo wye and 1/8th bend fitting be used in a vertical application as shown in the sketch?
    2) Will the shower and toilet be wet vented by the lav's 2" PVC pipe that runs to the roof?

    I would greatly appreciate any help and advice. Thank you.
    (1) Yes it can.
    (2) Your group will be wet vented by the lav vent.
    Just the way I like to see them! Simple and uncomplicated ! Good luck, Tom
    jk47's Avatar
    jk47 Posts: 6, Reputation: 1
    New Member
    		  
    #3

    Jul 13, 2005, 01:27 PM
    Great. Thanks for the quick reply Tom. I appreciate your help.

    I have another question. Should some type of sleeve be wrapped around the PVC pipes where the pass through the concrete floor? If so, what type of material should I wrap around the PVC pipes?

    Thank you very much for your help.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #4

    Jul 13, 2005, 02:45 PM
    Quote Originally Posted by jk47
    Great. Thanks for the quick reply Tom. I appreciate your help.

    I have another question. Should some type of sleeve be wrapped around the PVC pipes where the pass through the concrete floor? If so, what type of material should I wrap around the PVC pipes?

    Thank you very much for your help.
    We install a "closet wrapper" on all slab toilet stub ups. This is a styrofoam wrapper about one inch thick. This prevents the pour from blocking in the stubup and after removing the wrapper we have room to install a closet flange. We don't wrap the other drainage pipes. However we do install Armoflex pipe covering on all copper water pipes coming up through a cement slab. Cheers, Tom
    jk47's Avatar
    jk47 Posts: 6, Reputation: 1
    New Member
    		  
    #5

    Jul 14, 2005, 08:36 AM
    Sounds good. Thank you.

    I have one more question (I think). I have the option to install an inside toilet flange or an outside toilet flange. Is there any benefit to installing one or the other? Would an outside flange work better because it provides a larger cross sectional flow area?

    I really appreciate your advice.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #6

    Jul 14, 2005, 09:17 AM
    Quote Originally Posted by jk47
    Sounds good. Thank you.

    I have one more question (I think). I have the option to install an inside toilet flange or an outside toilet flange. Is there any benefit to installing one or the other? Would an outside flange work better because it provides a larger cross sectional flow area?

    I really appreciate your advice.
    If I had my druthers I'd use the outside flange for the reasons you describe. However if you have to chip cement to install one I'd go for the inside one. Good luck, Tom
    tpritchard's Avatar
    tpritchard Posts: 1, Reputation: 1
    New Member
    		  
    #7

    Dec 29, 2009, 10:07 AM
    Stub up with 4" pvc and then use a 4x3 flange into the 4" this will allow you to pour right to the
    4" closet riser and will also make anchoring the flange to the floor easy
    I also recommend that you use a flange that has the stainless steel ring
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Bathtub Venting question [ 3 Answers ]

I'm in the process of remodeling a basement bathroom directly next to an exterior wall. Previously there was a shower and now I want to put in a bathtub. When I took out the fiberglass shower, I found that the shower drain was connected directly to the main waste line leading out of the house. ...

Quick venting question [ 3 Answers ]

Hey guys, I've been gone awhile and am now back to my project. I have two 1.5" revent lines going back to my main stack. One is the laundry tub from the basement. The other has been wyed and hosts the kit. sink and the bath tub and sink. I would like to use a 1.5" wye and join them into my main...

Basement Venting Question [ 2 Answers ]

Just wondering if I can I put in a 2" common vent upstream from shower draining into a 3" line with a toilet downstream from the shower? If not, what are my options in this simple fixture layout? The total length of the 3" run is no more than from main and the length of each fixture drain is no...

Question about toilet venting [ 9 Answers ]

Hello all! I stumbled upon this forum... what a godsend! Anyway, here's a question for the plumbing experts. I have two bathrooms, each with one toilet and one sink. All four of these items are vented through a single 2" pipe up to the roof. I've been having a bit of trouble with the...

Roof venting question [ 1 Answers ]

Is it OK to join two 2" dry vents in my attic using a 3" tee (with 2" reducers). A 3" vent pipe would then be connected to the same 3" tee and exit through the roof. I would like to do this solution instead of cutting two separate holes in the roof for the two 2" vents to exit. Is this...

View more questions Search