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Old 04-22-2019, 09:02 AM   #31
thedayrock
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Replace Jacuzzi Tub with Shower

Ok. Dug deeper. Here is where I am at. Looks like the trap wraps under.

I am down 20.

Any advice on next steps?
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Old 04-22-2019, 12:19 PM   #32
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Updated picture - feels like the p trap swings underneath the 4 pipe.



Do I need to remove this trap or reconnect new branch to the 4 line?
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Old 04-22-2019, 05:53 PM   #33
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Sorry, Derek, I still can't see for sure what you've got there. Does your P-trap connect into the 4" like there where we can't see? Or does that 2" drain wrap 180 degrees or so under the 4" line and exit to the east? Or is something else going on there?
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Old 04-22-2019, 06:09 PM   #34
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While i thought the pipe connected to the bottom of the 4, after further digging it wraps around and connects into the Tee

Here is a better picture. You were all right there is a P trap!

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Old 04-22-2019, 06:42 PM   #35
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Now I'm waiting for one of our more astute plumbers to tell us that's not entirely legal, Derek.
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Old 04-22-2019, 07:38 PM   #36
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Looks like two snakes making out.
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Old 04-22-2019, 08:07 PM   #37
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I'm pretty sure that at the very least it needs a sweep to make it legal.
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Old 04-22-2019, 08:10 PM   #38
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A sweep 4 tee or sweep elbow into the existing tee? I want to get rid of the p trap going into the tee
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Old 04-22-2019, 08:55 PM   #39
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Either way, to dump into a line like that, every one I've seen has a sweep going into it.
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Old 04-23-2019, 06:52 AM   #40
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Another thought would be whether I can sweep into the 3 wet vent (goes up to vent above master bath and connects bath, toilet and sink upstairs)?
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Old 04-24-2019, 02:10 PM   #41
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Could i connect to the existing tee with a 2 internal coupling connected to a sweep?
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Old 04-24-2019, 06:47 PM   #42
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I think the guy that did that also built a few of those Houston freeways.
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Old 04-24-2019, 06:52 PM   #43
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What you have there is a trap arm connecting to a horizontal wet vent. The rules regarding horizontal wet vents vary by code/district and are dependent on how much is draining into that wet vent and the size of the wet vent etc. Maybe an actual plumber in here can comment. However, as far as I'm aware (I'm not a plumber), a tee is never allowed to connect horizontal to horizontal like that. I think you would need a WYE fitting there at a minimum to join the two horizontal runs. What I'm thinking is you would cut out that entire 4" tee fitting there and replace it with a 4 x 4 x 2 WYE on it's side to handle your shower trap arm (on the other side of the 4" pipe that is covered by mud so it doesn't interfere with your 90 turn in that 4" pipe. Make sure the WYE is positioned in the direction of drain flow in that 4" drain. Does the direction of flow go towards the vertical pipe rather than towards the 90 bend?

One like this

You would then put the trap wherever you want your new shower drain to sit and connect the trap arm from the trap into the 2" side of the WYE. Remember the vertical tailpiece of the shower drain connecting to your trap shouldn't exceed 24" in length under code and a maximum of 1/4" per foot of pitch for your trap arm (and 60" in length for a 2" trap arm but you don't have to worry about that).

It doesn't look like you're going to have the wiggle room to cut out that whole 4" section and connect all that in there like that though. So I'm truly at a loss here, a licensed plumber may be on order.
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Old 04-26-2019, 07:22 AM   #44
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Thanks!

plumbing question...

Does shower trap have to be below horizontal wet vent or can it be above. With a vertical arm connecting to horizontal wet vent?
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Old 04-26-2019, 10:35 AM   #45
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How could it be bellow? All drainage systems must pitch from higher to lower to prevent back flow. If the trap arm is below its output drain then water can freely drain into the trap arm. The trap arm must pitch into the drain at the specified 1/4" per foot. You don't want to exceed this too much (depending on your trap arm length) because you can siphon out your trap. That's why trap arms have a max length before vent based on 1/4" per foot of pitch (which is 60" for a 2" trap arm). The trap arm must always have an air gap running above the flow of waste to prevent a siphon situation that would drain out your trap and create an open air path to the sewer system.

Here is something I found (no idea on the accuracy of the advice which will vary on your local codes):

https://terrylove.com/forums/index.p...-design.69073/
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