I replaced an old washing machine that drained with no problem into my wall drain pipe. When the new washer was hooked up, the drain pipe could not handle the volume of water and overflows. If I put the washer on slow setting, it drains fine.

I had a plumber out to check and see if I had any clogs. He confirmed there were no clogs. He did, however, state that the newer washing machines drain much faster than the old ones and older plumbing drain pipes cannot handle the water flow. Apparently, new building codes require larger drain pipes now.

Any suggestions for how to fix this problem? I just leased my house to a new tenant who doesn't have a slower speed setting on their washer. Any help would be appreciated.

You need to close off the stand pipe where the washer drain connects to with a compression fitting, (see image) or I caulked the hose in with rags and sealed it with duct tape. This makes a water tight connection between the washer and the stand pipe, or wait until the other expert's gets on line good luck.

John

Your plumber was correct. The older washer stations can't handle the newer stronger pumps.
There is a inexpensive solution to this. I had to do it myself on my own washer and countless of our clients has had to do the same thing. In all the years that we have been advising connecting the washer hose to the stand pipe and turning it into a closed system we have never got back a single complaint.
This forces the water ,under pressure, to exit the washer without backing up.
This can be done by attaching the washer hose by a compression fitting or other fittings that use hose clamps,(see images).
Until you can pick up a fitting to close off the standpipe you can simply duct tape the hose but this is just a temporary hookup. Good luck, Tom