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Old 07-04-2013, 06:26 PM   #1
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New Shower Drain


Installing a new shower/master bath remodel. I had to install a Fernco to the cast iron drain pipe then to the pvc nipple & drain. My concern is that the new drain will be too high. The top of the drain is 2" above the slab, my framing for my curb is 3" high. Will the 2" height be ok?..
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Old 07-04-2013, 07:24 PM   #2
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New Shower Drain


It's not going to work unless you plan on making your pan plus the tile 2" thick. Plus your curb inside the shower will be about 1" tall.
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Old 07-04-2013, 07:43 PM   #3
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Originally Posted by djlandkpl
It's not going to work unless you plan on making your pan plus the tile 2" thick. Plus your curb inside the shower will be about 1" tall.
Suggestions??...
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Old 07-04-2013, 07:50 PM   #4
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Can you describe what is below the slab or post some clear photos?

Is the Fernco connected to the trap or a straight run of pipe? You need to get the drain height lower. It might involve breaking out the concrete to get at more of the pipe.
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Old 07-04-2013, 08:00 PM   #5
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I am in Florida. Under the slab is grade. I already chipped out the concrete and took 2" off the cast iron pipe. Its a vertical pipe coming from under the slab. A little background for you. The original 3 piece pvc drain was just set on the cast iron drain pipe, no okum, nothing. Just lifted right out when I chipped out all the old mortar bed. The pic is before I chipped out the concrete & cut the drain down 2"...
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Old 07-04-2013, 08:05 PM   #6
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You need to cut more off the cast iron so you can get the drain to the finished height of your floor.

Hopefully one of the pro plumbers will stop by and give more ideas.
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Old 07-04-2013, 08:10 PM   #7
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I mean if I have to cut more pipe I am going to have to chip out almost all the way to grade... Eeeek!!!!...
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Old 07-04-2013, 08:30 PM   #8
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Why is the drain body so tall? Can't you find a lower profile?
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Old 07-04-2013, 08:38 PM   #9
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Why is the drain body so tall? Can't you find a lower profile?
The original pvc drain was literally just set on top of the cast iron drain pipe. I wanted to add a Fernco, 2"x 2", then a 1" nipple of 2" pvc into the bottom of the new drain & into the Fernco.
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Old 07-04-2013, 08:41 PM   #10
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You should use a 2" drain body only- it will attach directly to the pipe- no nipple needed.
That drain looks like a 3" with a bushing in it
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Old 07-04-2013, 08:46 PM   #11
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Quote:
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You should use a 2" drain body only- it will attach directly to the pipe- no nipple needed.
That drain looks like a 3" with a bushing in it
Its 2". So the 2" drain body would just rest on top of the pipe?. No Fernco needed?. That's how the original drain was, just set on top of the pipe...
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Old 07-04-2013, 09:18 PM   #12
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There are multiple drain bodies available. Looks like yours has a hub on it and you glued a pipe stub into it. this makes your drain a couple inches taller.

you want a body without the hub- the outlet is the same diameter as the pipe.
You then connect the body directly to the pipe in the ground using a no-hub coupling- it's the same as the fernco except it has an exterior shield to it. Much better than a normal fernco
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Old 07-05-2013, 03:40 PM   #13
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So here is the hopefully finished product. Took off more of the cast pipe. I have a 1/2" between slab & drain.
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Old 07-05-2013, 03:55 PM   #14
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E-Plumber--that is a membrane clamp drain for 2" PVC---

Scot---You will not want to hear this, but I'll bet you already have it figured out---

Open the concrete---cut out the old P-trap and change it to PVC---then everything will work right and you will eliminate the rusty old trap from your life.

Rent a large chipping hammer or a jack hammer and be on the way---

How to build a shower - Building a shower pan with pre-sloped mortar bed, liner and curb.
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Old 07-05-2013, 04:29 PM   #15
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Quote:
Originally Posted by oh'mike
E-Plumber--that is a membrane clamp drain for 2" PVC---

Scot---You will not want to hear this, but I'll bet you already have it figured out---

Open the concrete---cut out the old P-trap and change it to PVC---then everything will work right and you will eliminate the rusty old trap from your life.

Rent a large chipping hammer or a jack hammer and be on the way---

How to build a shower - Building a shower pan with pre-sloped mortar bed, liner and curb.
Mike,

I appreciate the link. I guess I am just looking for the answer if 1/2" is low enough above the slab.

I am not planning on chipping out and replacing the cast with pvc. As far as I am concerned that is asking for trouble especially being that I do not have a basement to go in and look where the cast ends. I feel that that the direction I am headed & the work I have done is ok to this point.

So is anyone willing to answer my original question of is 1/2" ok??
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