I'm turning one basement unfinished room (90% of basement is finished to code in 2001 and include the bathroom plumbing I want to tap)
I'm adding a utility sink and a washer. I plan to add these to the existing 2" drain line with an extension on both sides of the existing drain tie in. As a Newb, I've read quite a bit but now its all jumble. My questions are as follows:
Can I tap the existing drain line and water supply?
If so, are there any length consideration I need to know ( I know slope)
Are there any heigth considerations for the fixture drain locations? I know for the washer we need to be higher than any water level in the machine. There are minimum distances from the top of that drain to the weir but I don't know what they are?
None of the existing plumbing is vented from what I can see. Do these new fixtures need to be vented?

Thanks.
Roscoe in Fairfax County, VA.

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Can I tap the existing drain line and water supply?

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Yes as long as it's vented.

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, are there any length consideration

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No! The vents will come off the trap so there's no problem there. You weren't Thinking of using the existing sinks trap and vent were you? Instead of a separate washer station why not install the washer/dryer next to the future utility sink and discharge the washer into that? Can you explain a little further how you plan on draining and venting the fixtures you wish to install? Back to you, Tom

If you have NO vents connected into this entire bathroom group then that 2" pipe picking up that sink NEEDS to be extended to, at a minimum, act as a WET VENT for the bathroom group by connecting into another 2" or larger vent or by penetrating the roof with this pipe.

Unfortunately, with wet vents you cannot discharge a washing machine drain into them... not anywhere that I know of anyway? Tom (or the other guys), can you discharge a washing machine into a wet vent in your area?

Anyway, the unpopular answer here is that you need to vent that bathroom group and as awful as this is, you really need to break open that concrete floor and connect into the 3" drain line... AFTER the wet vent/sink drain connection!

Heavy duty stuff here! I'm hoping we can find a way around some of these codes for you somehow! Post back with your thoughts so far,OK?

Mark

Why didn't they run the H/C water lines through the studs like the drain. Now you will need to rip it all out. By the way, what is the stud wall spacing?

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Tom (or the other guys), can you discharge a washing machine into a wet vent in your area?

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Not in SPC code. I sure would like to see what the bathroom group looks like. And that sink drain. Is it picking up anything else? To my way of thinking you don't need a washer station if you have a utility sink installed. Or have I missed something? Regards, Tom

Yeah, I was thinking of just installing that utility sink, too. It might work as long as no other fixtures are on the line and they vent the utility sink into the 2" wet vent and run that 2" wet vent all the way to a 2" or larger vent. That would work for me, too.

A cleanout right where the pipe comes out of the ground works for me as well!

Mark