Slab plumbing

[rustyshakelford]

Had a thread asking the general consensus on adding a bathroom to an office were fixing to build. Have a 7x20 extension framed up for Concrete and will be adding a 3 piece bathroom in the corner of the add on. Only plumber I can get to respond for such a small job told me $300 per fixture or $900 total for the plumbing. We’re talking sink, toilet and shower and that was just for the in concrete work with pvc. I’ll be setting a septic wherever is convienent. At this point does anyone know of a tutorial or YouTube video that can show me what to do? Really excited to get this concrete poured so we can get on with the building of the office. Having professionally poured, they will reinforce the forms...

Specs are 22x20 when extension is poured. 10’ min interior ceiling. Will most likely frame in a bedroom for out of town customers and also spill over guest house.

Brett

 

[The Cobbler]

do you need a permit?
if you sketch out dimensions & where you want the fixtures, I'm sure someone on here can do you up a diagram .

 

[rustyshakelford]

do you need a permit?
if you sketch out dimensions & where you want the fixtures, I'm sure someone on here can do you up a diagram .

I’m easy. Looking at the pic, where the dark Dirt is, I’m thinking a built in shower in the corner. Toilet next to it or closer to us in the pic and a sink on the opposite wall. No idea of ideal spacing, should have plenty of room to not make it to tight.

Brett

 

[The Cobbler]

can you give an idea of where the entry door will be, how big the area is and where you would like the fixtures?
draw out a sketch of what you're thinking

 

[matt_i]

Imo, you have to draw a layout of the finished bath locations. Don't know if you are using a fiberglass pan, a built-up tiled floor, or an entire fiberglass enclosure. Commit to that and buy the part so you don't change your mind, and design around the manufacturer's specs.

And then commit to a sink and toilet. Download their specs to see where to rough in the drains. The sink isn't that hard, but the toilet needs a commitment just like the shower.

The pressure lines are easier actually, although placing them in an outside wall is at some peril if it freezes. PEX is advertised to make this better though.

It also needs a commitment to where the septic tank is going to be and also the drainfield....as it all has to flow downhill......

 

[JoeMcGov]

Imo, you have to draw a layout of the finished bath locations. Don't know if you are using a fiberglass pan, a built-up tiled floor, or an entire fiberglass enclosure. Commit to that and buy the part so you don't change your mind, and design around the manufacturer's specs.

And then commit to a sink and toilet. Download their specs to see where to rough in the drains. The sink isn't that hard, but the toilet needs a commitment just like the shower.

The pressure lines are easier actually, although placing them in an outside wall is at some peril if it freezes. PEX is advertised to make this better though.

It also needs a commitment to where the septic tank is going to be and also the drainfield....as it all has to flow downhill......

This. All you're looking to rough in is the sanitary sewer. Gravity fall. You MUST identify the septic system location and invert elevation of pipe into the septic tank. MUST.

Here's my advice: pump the brakes. You need to sketch all this out and do some math. Pointless to rush and install only to find out your waste "just won't get there from here."

 

[rustyshakelford]

Excuse the poor drawing. I’ll buy the shower pan and toilet next time I go to town.

Brett

 

[kelpaso1]

Easier, and cheaper to keep all the plumbing on one wall.

 

[ard]

Ive read this thread 3 times... cant resist.

Google "bathroom floor plan 7ft"...click on 'Images'

or bathroom floor plan 7ft stall shower.

Now, look at these. Try and decide what YOU want. Personally I despise plastic shower pans and 3 glass slides- im more of a mortar bed tile guy, but whatever.

You dont NEED to make it 7ft. There are some nice layouts for a 9x5- where you get a 5ft x3ft stall shower on one 'end', sink and toilet.

(Oh, in cold climates you might want to keep plumbing off the exterior walls- dont think that applies here. And I wouldnt sweat the 'all plumbing in a line'... just too small and piddling a job, and as a DIY you might save $13.)

One you decide, the rest is easy:

1. The sink just needs a drain IN THE WALL. (You will come up inside the wall, then a 90 to a P trap for the sink.) You need a vent too, but again this is in the wall AND done after framing

2. For the toilet, you want the drain 12" from the wall. 12.5 inched from the framing (wall) it is mounted in front of. This WILL need a vent that comes up out of the concrete.

3. Shower is based on whatever pan you buy.

You should recognize that *YOU* need these 'things' even if you hire a plumber. They cant make this up for you.

PS 20x22 isnt big. Glad you made that spare bedroom wider than 7 foot! You should scale your drawings, it helps ground oneself in reality.

Now, if you want to DIY....once you have the above done, come back and I am sure folks can tell you fittings, pitch, mounting, vent connections

 

[rustyshakelford]

Ive read this thread 3 times... cant resist.

Google "bathroom floor plan 7ft"...click on 'Images'

or bathroom floor plan 7ft stall shower.

Now, look at these. Try and decide what YOU want. Personally I despise plastic shower pans and 3 glass slides- im more of a mortar bed tile guy, but whatever.

You dont NEED to make it 7ft. There are some nice layouts for a 9x5- where you get a 5ft x3ft stall shower on one 'end', sink and toilet.

(Oh, in cold climates you might want to keep plumbing off the exterior walls- dont think that applies here. And I wouldnt sweat the 'all plumbing in a line'... just too small and piddling a job, and as a DIY you might save $13.)

One you decide, the rest is easy:

1. The sink just needs a drain IN THE WALL. (You will come up inside the wall, then a 90 to a P trap for the sink.) You need a vent too, but again this is in the wall AND done after framing

2. For the toilet, you want the drain 12" from the wall. 12.5 inched from the framing (wall) it is mounted in front of. This WILL need a vent that comes up out of the concrete.

3. Shower is based on whatever pan you buy.

You should recognize that *YOU* need these 'things' even if you hire a plumber. They cant make this up for you.

PS 20x22 isnt big. Glad you made that spare bedroom wider than 7 foot! You should scale your drawings, it helps ground oneself in reality.

Now, if you want to DIY....once you have the above done, come back and I am sure folks can tell you fittings, pitch, mounting, vent connections

Awesome! Thank you. I’m going to give this a shot myself. Don’t really know why I picked a 7’ extension. Just wanted it to be big enough. Bedroom will probably be around 10x11 or so. Mainly big enough for a queen size bed and night stand. I need a place for customers to hang out while I do small projects and we get several folks from several hours away and on the smaller two day jobs, it’ll keep them from having to get a hotel. We’re about 20 mins from town and Uber isn’t out here.

I’ll call the glass company tomorrow and see what an enclosure would cost. I’m betting I could figure out how to tile a bathroom and would much rather have that look vs the one from Home Depot.

This project started as a $400 load of rock and turned into 4185 sq ft of Concrete not including this stuff that needs to be poured.

Brett

 

[yatg]

For that use, you might want to consider making it into a mini master suite. Sort of like a hotel suite where there's a bedroom area, sink/micro/fridge area, and a shower/toilet area.

And maybe make your finished shower a decent size, like 36x48.

 

[rustyshakelford]

For that use, you might want to consider making it into a mini master suite. Sort of like a hotel suite where there's a bedroom area, sink/micro/fridge area, and a shower/toilet area.

And maybe make your finished shower a decent size, like 36x48.

That’s an excellent idea!

Brett