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Old 01-23-2012, 03:35 PM   #1
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Walk-in Shower, cutting waste pipe


Hi,
I am working on a bathroom remodeling and want to recess my shower so that I can walk in at ground floor with no knee wall, and then the floor will slope down towards a drain. In order to do so, I will need to cut into the concrete floor, and then rebuild the shower pan below grade. What I am wondering is if I can cut the drain pipe lower to accomodate this.

Currently I have about 12" to the bottom of the waste pipe. I will need lose 1" because it is currently that high about the floor, and then I will also want to lower the pipe 2" to allow for a lower drain inside the shower stall. So I will be losing 3" of pipe height, leaving 9" from top to bottom of pipe. I am 50/50 on there being a pea trap , but assuming there is, is this okay to do? Is there any reason I would need that extra drain height?
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Kevin
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Old 01-23-2012, 06:54 PM   #2
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Walk-in Shower, cutting waste pipe


Do you call it a pea trap because you pea in the shower

All jokes aside, you shouldn't have a problem if you only need to lose 1" of the pipe... At worse, you could change the P-trap out to 1 1/2" and adapt you plumbing to acommodate provided that your not reducing the flow.

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Old 01-23-2012, 07:36 PM   #3
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Walk-in Shower, cutting waste pipe


ha, when you got to go...

I will actually be cutting off 3" of the pipe total. The house was built in 1960, and I am not sure if there is actually a P-trap. I am just concerned about dropping the height of the pipe. I guess it is hard to say without knowing if there is a P-trap and what height the line comes back up to.
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Old 01-23-2012, 08:07 PM   #4
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Walk-in Shower, cutting waste pipe


Sounds like you'll know for sure when ya tear that puppy up

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Old 01-24-2012, 04:05 AM   #5
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Walk-in Shower, cutting waste pipe


Once you have the slab open --post a picture if you can---there is another thread going here about building a barrier free shower on a slab--If I find it I'll post a link.

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Old 01-24-2012, 07:05 AM   #6
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Walk-in Shower, cutting waste pipe


Sunken showers or flat walk ,in no shower pan needed, at least under our code.
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Old 01-24-2012, 12:36 PM   #7
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Walk-in Shower, cutting waste pipe


Thanks. I checked into that posting you sent. Good info. I am going to try to just remove some of the concrete, probably 3" depth, in order to install a presloped floor, paint on membrane, mud bed, then tile. So I am not planing on opening the entire floor up.
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Old 01-24-2012, 01:59 PM   #8
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Walk-in Shower, cutting waste pipe


It will be easier if you do! (remove the entire floor)
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Old 01-25-2012, 10:42 AM   #9
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Walk-in Shower, cutting waste pipe


I am just nervous removing all of it. But I was wondering if it would be more work to try to precision out a section, or just remove the whole thing and start from scratch. I could enlarge the pipe then potentionally. It is a small drain pipe right now, about 2" maybe. I am a landscape contractor, so I am familiar with concrete, but just not interior work.
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