Hello:
I am planning on moving my laundry room up to the second floor of my home. A full bathroom is on the back side of the wall I want to put the laundry equipment against. The existing 1 1/2″ drain for the bathroom sink is approximately 28″ from the main 3″ house stack. The perfect spot for the washing machine is right beside the main stack.
Is there any concern with tapping into the existing 1 1/2″ drain and just installing a new 1 1/2″ trap with the standpipe above for the washing machine. Does the new trap need to be a certain minimum distance away from the main stack? The current scenario would put it within a few inches. The new trap would be approximately 12-14″ off the floor and I can extend the standpipe to whatever my new washing machine requires.
If this is not acceptable, I have enough room to cut out the existing T and install a double tee, using a no hub connector, with the existing 1 1/2″ drain leading into one side and a new 1 1/2″ trap with standpipe on the other side. Doing it this way would enable me to use 2″ for the washer trap if it is necessary but from what I can tell 1 1/2″ is fine.
I do not have the room/layout to just T a standpipe off the existing drain, between the trap and the bottom of the sink, so I need to add a trap.
Thanks for any input.
Replies
Can't comment on the drain issues you raise right now, just want to impress upon you that they're only one piece of the big picture.
Make sure you consider the floor stiffness, and any possible reinforcement required, as this will be a large part of a successful 2nd floor Laundry Room (or 1st floor for that matter, if not in a basement or on a slab).
Purpose built 2nd Floor Laundry's I've seen have a full pan under the room and provide a sloped floor to a drain. An overflowing Washing machine on a 2nd floor presents ~ 10 x the problems of one on the 1st floor, and ~100 times the problems of one in the basement.