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Old 05-16-2013, 07:15 PM   #16
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Double shower drain vent question.


You would be turned down if I inspected you as soon as I saw the rubber fernco fittings.......

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Old 05-16-2013, 10:24 PM   #17
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Double shower drain vent question.


Quote:
Originally Posted by Ghostmaker View Post
You would be turned down if I inspected you as soon as I saw the rubber fernco fittings.......
Dammit. Ok...don't come over just yet....

Don't leave me hangin'...ferncos no bueno?
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Old 05-16-2013, 10:29 PM   #18
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Double shower drain vent question.


Use proper band adapter fittings. Ferncos are no good they do not hold shape. Use mission brand transitional couplings.


http://www.wamhomecenter.com/product...ings-c1560.htm

Where your tying in isn't that galvanized nipples. Why not hit them with some oil to loosen them and unscrew them and just buy the threaded plastic adapter to screw in there.

Last edited by Ghostmaker; 05-16-2013 at 10:33 PM.
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Old 05-16-2013, 10:31 PM   #19
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Double shower drain vent question.


And btw, it's spider, fly, and heat season....I need to close this thing this weekend!
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Old 05-16-2013, 10:36 PM   #20
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Double shower drain vent question.


Gotcha! Thanks for the quick reply, Ghost. You rock!
Are they available at supply stores?

Is the short 45 and ladies choice for the last run ok?

Tom
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Old 05-16-2013, 10:38 PM   #21
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Double shower drain vent question.


Just make sure you vent up by the shower with a tee on its back and vent the lav also... Off the top after picking up the lav. Have fun... Get yourself a 3 foor pipe wrench and a cheater bar to unscrew the galvanized nipples. Use a teflon pipe dope to screw in the PVC plastic threaded adapter.. No biggy.
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Old 05-16-2013, 10:42 PM   #22
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Double shower drain vent question.


Sorry, Ghost....didn't see that paragraph after the link. I tried with Herculean might to loosen that fitting on the 2 inch...gave me a hernia and wouldn't budge. I didn't even try the 1.5. I could give it a shot tomorrow. I wire brushed the 2 inch, but the adapter wouldn't thread on...
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Old 05-16-2013, 10:54 PM   #23
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Double shower drain vent question.


Ok, so a tee instead of the wye? Got it.

I'm not sure I get what your saying with "off the top after picking up the lav."

The sinks are vented separately (in my thread "double sink rough in...". The vent pipe meets the vent pipe (that is in the shower area) in the attic and has a tee to the roof vent. Shower vent--->tee<---sink vent---> roof vent. Am I understanding correctly?

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Old 05-16-2013, 11:17 PM   #24
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Double shower drain vent question.


Your heirarchy of drainage goes like this (Fixture first)

Fixture

Tailpiece

Trap

Trap arm

Vent

Drain


No other fixtures should be tied in between a fixture and it's vent.


There are certain situations where you can do some tricky things, but for a beginner on a second floor with limited space, i'd recommend keeping it simple.
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Old 05-16-2013, 11:34 PM   #25
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Double shower drain vent question.


Thanks, Alan.

Here's a pic from my other thread (Double sink rough in. . .). The vent pipe you see here from the sinks goes to the attic and tees in with the vent pipe from the shower and exits through the roof vent. There are no other fixtures between the sink vent--->roof vent. . . .and between the shower vent--->roof vent.

Good??
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Old 05-16-2013, 11:38 PM   #26
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Double shower drain vent question.


That is all fine, but not what he was talking about. He's making sure you don't have the wye for the lavs between your shower vent and the shower trap.
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Old 05-16-2013, 11:40 PM   #27
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Ok, that's what I thought. Totally separate. Thanks for the clarification.
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Old 12-10-2013, 06:19 PM   #28
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OK. . .I'm back after a long hiatus!!

Unfortunately, I had to take some time off from the remodel over the summer and fall. . .but the last time I was in there, I grabbed all of my supplies and tools and threw them all up in the air and when I came out of the big puff of smoke like the Tasmanian Devil, here is where I left off. . .

* All of the plumbing, drains, and venting to the double sinks is roughed in and functional with no leaks. . .
* The shower area is roughed in, insulated, and all of the plumbing is roughed in and functional with no leaks. . .

You can see from the pic below how I decided to run the shower vent to the roof. Don't ask how I accomplished that so masterfully It was a bear! (Although it's just dry fitted right now).

Double shower drain vent question.-pic-005copy.jpg
Double shower drain vent question.-pic-001copy.jpg

A "E" suggested and as you can see from the pic below. . .I plan to run the trap arm through the joist into the "original" joist bay, connect to a long 90, tie into the vent, and then continue to the stack.

Double shower drain vent question.-pic-003copymarked.jpg

So, a few (hopefully easy) questions . . .

1. Does the trap arm need to be level, pitched towards the p-trap, or pitched away from p-trap? And is there a maximum length requirement?

2. Are there any specific requirements regarding the pitch of the drain pipe between the long 90 and where it ties in to the vent (dotted line)?

3. As long as there is proper pitch towards the stack in the remaining section of drain (1/4" per foot?), does it matter how I accomplish this? It looks like a 22.5 degree ---> 22.5 degree (blue arrows) ---> long 90 will work best.


And look, Ghostmaker. . .transitional couplings!

Thanks in advance!

Tom
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Old 12-10-2013, 07:24 PM   #29
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Double shower drain vent question.


That looks good!
All horizontal drain lines need to be pitched/graded/sloped, etc. to the drain stack-or away from the trap at 1/4" per ft. This includes the trap arm.

you can offset using 22's or 45's- avoid anymore 90's
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Old 12-10-2013, 07:31 PM   #30
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Double shower drain vent question.


Where to begin?
Those nice rubber fittings with radiator clamps Illegal fitting.
You need to vent the shower in a vertical position.
You should unscrew the nipples out of the cast iron and screw in MIP plastic adaptors with teflon tape and pipe dope on the threads.

You must of posted right when I was typing.

The bold part eliminates 2 easy leaks in your future.

Also Use a all glue trap. Not a LA trap with nut. You can not bury them. They are also another pointless leak.

Wheres the lavatory sink?

Are you installing a base or a pan for tile?

Also the code requires your shower to be 2 inch because it is now a wet vent for the toilet.

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Last edited by Ghostmaker; 12-10-2013 at 07:38 PM.
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