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Discussion Starter #1
As far as adding plumbing for a basement shower goes, this is probably one of the easier jobs. The drain will be located roughly 2.5' from a 2'x2' framed hole in the concrete where plumbing enters/exits the home (pics will follow) and the plumbing wall backs the boiler room.

Current bathroom is half bath and is 4" shy of 5' wide. I added a crude drawing of the floor plan. I plan to take down existing bathroom walls due to the shortcuts taken (2x2s with a 1x4 sill plate, centers anywhere from 14"-26... wow). I can't move the plumbing wall and don't want to take space away from the bedroom, hence the small jog in the wall to fit a 5' tub.

I understand I will be cutting and/or chipping out concrete.

The question is, what do I do for a trap? I am correct in understanding you frame out a 1'x1' box for it then fill it with gravel?

Anything tips for connecting this to the main plumbing?

Thanks!
 

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A couple of questions---is the existing drain set going into the pit in the drawing?

If so is the pit properly vented.

Are the drains PVc or iron?

Are you using a standard shower pan?---Mike---
 

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Is the existing drain set going into the pit in the drawing?

- Going off memory I believe so, will looked into and post pictures.

If so is the pit properly vented.

- I don't believe the pit is, but I think there is a vent going straight up from the sink.

Are the drains PVc or iron?

- PVC

Are you using a standard shower pan?

- Standard tub with surround
 

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If that pit is a sewage pit--and has a vent---the job may be as simple as adding a 2" drain from the shower to the pit---with the appropriate P-trap.

Do check.---Mike---
 

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Yes. When the pan is set masons mortar will be placed under the pan (and over that gravel) to keep the bottom of the pan from flexing.
 

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I put the electrical box roughly where I figure the drain will go. It's a bad angle but you can see the sink plumbing and vent to the far right in the picture of my water softener. The vent doesn't go straight up, it goes across the roof and ties into the plumbing going to the top floor (split level house). It's hard/impossible to tell exactly how that toilet/sink tie into the drain without chipping out all the concrete. It's no doubt it ties in around there... just not sure if it's directly under where i want my P-trap to go.
 

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You are going to have to cut into the drain pipes for that---I thought the 'pit' in the picture was a sewage pit with a pump. You will need to measure the distance from your new shower drain to the nearest plumbing vent on that line of drains.

If the vent is more than 5 feet,an additional vent will be needed for the shower.---Mike---
 

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Discussion Starter #10
oh'mike said:
You are going to have to cut into the drain pipes for that---I thought the 'pit' in the picture was a sewage pit with a pump. You will need to measure the distance from your new shower drain to the nearest plumbing vent on that line of drains.

If the vent is more than 5 feet,an additional vent will be needed for the shower.---Mike---
How about good news... You have any of that? Haha...

I'm sure it's way past 5', probably closer to 20ft of lateral travel.
 

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Discussion Starter #11
Probably only 5' before it's 'dry pipe', but it still goes laterally another 15' or so. Does it matter if it's a dry vent, but it's not straight vertical?
 

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Different terminology---There should be a vent pipe rising out of the floor (2") behind the toilet.

That is the vent I'm talking about.

As to cutting into the main drain in the floor that's a good thing --as long as the existing piping is not in the way of locating the shower drain.---Mike---
 

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That's the vent----sorry,I was looking for a white pipe.

You will need one like that for the shower also. 2" for the drain and 1 1/2" for the vent.

Vent can be tied into the other vent.---Mike----
 

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Abs is not used in this area---only PVC ,so I am not used to looking at the black abs---

Our codes are very restrictive here.
 

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Discussion Starter #17
Well, after a mere 5 months I figure I'd get started on this thing!

Personally I wanted to take down everything but the wall shared with the bedroom, but time constraints are having a devastating effect on the WAF. I will still try to convince her to let me raise the ceiling though. I have no idea why anyone would put in a 6'6" ceiling when there is nothing in the way of the 7'6" joists??

Heres the question. The toilet drain is directly under it like I thought, but shouldn't be an issue. It's 9" from the top of the pipe to the top of the concrete. The question is can I just trap it and dump it in that pipe, or should I chip out more crete and go to the main line?
 

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Tape out the location of the shower and post another picture-----

You should be able to at a Y and possibly a vent then the P trap.
 

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Open the floor to the center of the shower---add a y---2" and bring the pipe 9and P-trap) to the center.

Are you using a premade base?
 
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