Hello all. This is my first post on this forum.

I want to build a 1/2 bath and separate utility room in my unfinished basement. The utility room will be behind the bathroom (in front of, going by the orientation of the first picture below) and hide the heat pump fan coil (air handler), water heater and a utility tub/sink. The wall in these pictures is a (pitiful) curtain put up by the prior owner, and I'll be removing it. Here are my questions.

1. Are the vertical pipes that come together vent pipes, and all the venting I will need?

2. Can I connect a closet flange to the rough-in pipe without significantly raising the floor? I'd prefer to lay tile or vinyl directly to the concrete floor (in the bathroom). The rest of the basement will have a floating floor.

3. I've never connected a closet flange, and could not find a how-to. Would someone please explain the details or point me to a how-to?

4. It seems from the measurements between these rough-ins that I should place the dividing wall between the bath and utility room right where these (assumed) vent pipes are (enclosing them). They are about 14"-15" from the center of the 4" closet pipe. Does this seem right?

5. For the other walls, is it 12" behind from the center of the closet pipe and 15" from a side wall? Are these dimensions from the finished wall or stud wall?

6. Do I use two separate Ys on the sink pipe; one for the bathroom drain and one for the utility tub/sink, giving each their own trap?

speedball1

(1) If you hadn't shown me the #2 picture I would not have realized that the right hand pipe was a vent and the left hand pipe was a revent. They should more then cover the venting needs for your bathroom group providing you tie the washer and lavatory into one of the vent pipes.
(2) There is nothing to connecting a closet flange. I would first mud and tile the floor using a stryafoam (sp) closet wrapper around the closet stub up to leave a little space for the flange to recess into. After the tile's in just prime and glue the flange to the closet stup up.
(3) See above.
(4) Not having a fixture and future wall layout makes it difficult to answer.
(5) For the toilet, 12" from the back rough wall. Depending on the tub you wish to install, (some differ) the average is 15 1/2" from the side wall plate,(rough wall).
(6) Code dictates that each fixture shall have its own trap.

You haven't mentioned a washer. Will that be included as well?
More questions? I'm as close as a click. good luck, Tom

pnosko

My laundy room is on the 2nd floor near the bedrooms; there will be no washer down here. The 1/2 bathroom will have only a toilet and a sink.

But I want a utility tub/sink in the utility room as I will be draining various things into it (hot water heater pressure relief, condensation pump for fan coil, icemaker from kitchen above, RO filter waste). By utility tub/sink, I meant the following.



(1) I'm not sure what you mean by "tie the washer and lavatory into one of the vent pipes". I assumed that the vent (not sure what a revent is) is already tied to both the closet and sink stubs under the concrete. Will I need to cut into these vent/revent pipes at all?

(2) I've never held a closet flange in my hand. Do they glue to the inside or outside of the pipe stub? If inside, do I cut the stub flush with the floor?

(4) I'll post a diagram tonight if needed.

speedball1

Post the diagram with all the details and I'll answer all the questions at one time. Tom

pnosko

Tom, sorry for the delay. I'm reconsidering, thinking a full bath would add more value. Is that 2" stub sufficient for plumbing a drain for a bathtub and sink in the bathroom and a utility sink un the utility room? If so, would you have a suggestion on how to plumb these drains? I suppose the tub would need to be elevated a little.

speedball1

Post the drawing showing me the layout with measurements on the walls, existing drainage, and just what you want installed and where you want it installed and I'll see if I can come up with something. Tom