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Old 08-02-2010, 03:36 PM   #1
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4" drain for toilet?


I was just told I should use a 4 way (double "Y"?) tee for my toilets to drain down to, is this a better way to go? The long swooping sanitary 4"X 4 way is a 'special order' ...even from the big plumbing supply place! Expensive too....
Is 4" toilet draining that uncommon? It's what's in here NOW and has always performed admirably!
When I moved in all I did was replace the water lines, I did nothing to the drains as they were fine. So I'm kinda new to drains/vents.... but I'm learning fast!

Thanks everyone!

DM

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Old 08-02-2010, 03:42 PM   #2
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4" drain for toilet?


I used a 4" sch40 sanitary T when I redid mine in April. Special order? Not at my local plumbing shop. Seems like a pretty common item to me. I know some people use 3" pipe for toilet drains but since my main stack was 4" I just went with it instead of the smaller line.

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Old 08-02-2010, 03:43 PM   #3
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4" drain for toilet?


$9 Google it
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Old 08-02-2010, 03:46 PM   #4
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4" drain for toilet?


My son is 6' 5" so he leaves rather large "product" sometimes!
Between the 4" pipes and my FlushMateŽ toilet, we rarely have a problem. Po)
I'd like it to continue this way.

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Old 08-02-2010, 03:50 PM   #5
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4" drain for toilet?


Where is it $9.00??? I paid over 20 for the wrong one!
The swooping one is larger and costs more, I'm sure!
So.... would it be better/OK to use the 45° "Y" tee and 2 more 4" 45° turns to the 2 toilets?

Thanks!

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Old 08-02-2010, 03:52 PM   #6
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4" drain for toilet?


Yes use the double WYE and street 45's.

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Old 08-02-2010, 03:54 PM   #7
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4" drain for toilet?


Sorry just noticed that one's 3" but 4" is probably only a couple bucks more.
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Old 08-02-2010, 03:56 PM   #8
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4" drain for toilet?


Just searched again. I was wrong. $28.99 but shop around. Your local wholesale supply should be less than that.
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Old 08-02-2010, 03:57 PM   #9
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4" drain for toilet?


At HD the 3" was like $7.00, but the 4" was $21 or $22?
Seemed like a helluva markup for so little added plastic to me too!

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Old 08-02-2010, 03:58 PM   #10
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4" drain for toilet?


-=chuckle=- screw it, as long as the street 45°s are good, I'll go that route.
The wife already knows what they look like and where they are at HD and she's in town today! lol

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Old 08-02-2010, 04:05 PM   #11
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4" drain for toilet?


Quote:
Originally Posted by DangerMouse View Post
At HD the 3" was like $7.00, but the 4" was $21 or $22?
Seemed like a helluva markup for so little added plastic to me too!

DM
Yeah kinda silly. That's why most new construction you find it 3". Ok by code, but 4" is still better.

A toilet is only as good as the pipe under it.

Like the Kohler commercials are silly that show a guy flushin' towels, etc. down to stop the hot female plumber...

Guess that's what keeps the service guys in business. Haha
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Old 08-02-2010, 06:12 PM   #12
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4" drain for toilet?


Well, I called the HD and had them hold the 3 pieces at the service desk for her. It was $21 for the double wye tee and $5 something each for the street 45s.... So it's not THAT much more to be able to sleep easier tonight knowing the inspector will be happy. Po)
One more 4" 10'er and I'll be good to have him come out and see how I intend to set it up. I'll set the pieces in place and duct tape if necessary. I'm pretty sure that now, thanks so much to all here who have helped me, I'll pass with little or no changes.
(If they have to answer too many questions, there's a $50.00 "consultation" fee)

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Old 08-02-2010, 07:55 PM   #13
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4" drain for toilet?


As most of us realize, plumbing codes and inspectors interpretation vary. I work with 5 different variations within 100 mile area. I suggested a fixture cross to you because it is the prefered fitting here. Another option is a 4x3 sanitary cross. 3" is typical for a toilet trap arm. You can put 3 toilets on a 3" horz. pipe.
Look at the profile of a sanitary cross and imagine snaking your main through 1 toilet and hearing rattle in the one next door because it jumped across the dble san tee. There is a good chance your toilet flush will do the same thing. A portion of it will jump the cross and backwash the other toilet arm. A fixture cross is a little more directional than san cross. A double y with st 45's is flat out wrong. It will not vent properly.
Thats my 2 cents
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Old 08-02-2010, 08:58 PM   #14
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4" drain for toilet?


So....Lateral Concepts is wrong and I cannot USE the 3 pieces the wife already bought and paid for?????
AARGH!!! You're kidding, right? I HAD the white one already, that was wrong.... I don't think I can USE a black one with my white pvc without some special cement, and they don't have one anyways. How will the venting be any different using a double wye 4" 4 way? same thing basically, and the 4" vent is right in the middle of the two?
Confused again, as usual.....

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Old 08-02-2010, 09:11 PM   #15
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4" drain for toilet?


As I said- you can use a cross but try to use 4x4x3x3 3" is your branch size to your toilets(more than ample)
And the pix of the fixture cross is available in pvc too I just happened to find abs
You can try the dble wye if you want. I want to hear your inspectors response

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