Washer into 1 inch drain

Hi Terry (and anyone else who give us advice),
I really enjoy your forum and I've learned a lot already by reading. We are remodeling the bathroom in our 1920s bungalow, and we want to bring the washer & dryer up to the main floor, and to use the existing waterlines and drain previously used for the bath lav. We will use a 30 inch long 2 inch wide standpipe and a 2 inch p-trap (trap 12 inches from the floor measuring from the bottom of the trap). The question: we need to reduce down to 1 1/4 inch in order to utilized the galvanized reducer which goes into the cast iron dwv stack. The reducer accommodates a 1 1/4 pipe, but (I believe) it is only 1 inch inside measurement where it enters the dwv stack. Will this work for draining our washer? The distance from the trap to the galvanized reducer is 10 inches. Also, how should we best reduce to 1 1/4? 1 1/2 reducer and 1 1/2 pipe into 1 1/4 reducer then 1 1/4 pipe? Or can we just go 1 1/2 reducer directly into 1 1/4 reducer, then 1 1/4 PVC on into the galvanized? Our washer is a 3 yr old Kenmore super capacity plus top loader- just the typical whiteware. Thanks in advance for any advice you can give.

Reducing a washer drain to less than 2" is a bad idea.

I would cut into the stack and insert a fitting that has the 2" outlet.
If the stack is cast iron, you can rent a cutter that will snap the pipe section out.

If you want to use something less than 2", just buy a mop. Your'e going to need it often!

pipe

If the pipe measures 1" on the inside then it is a 1" pipe and it will never drain your washing machine without overflowing. But since I have never seen a drain tee that had a 1" opening in it, yours must have an additional bushing to reduce it to that size. If the original opening is at least 1 1/2", ( 1 7/8 o.d.), then it may work.

Everyone, thanks for your replies. I'm going to re-measure the galvanized piece, and pray it's 1 1/2 inches. If not, oh well, laundry room stays downstairs. Thanks again.

Checking in to report SUCCESS! HJ, your tip about the outside diameter was just what I needed to know. The galvanized was indeed 1 1/2 inches. Hey Jimbo - I've washed a couple of large loads and I haven't used the mop yet!!