I'm having a problem with my stand pipe overflowing when my washing machine empties into it. I've already snaked the drain, and after doing so, I brought my garden hose into the house and flushed out the pipe for about 5 minutes. The stand pipe never even came close to overflowing with the garden hose (I have a trigger attachment with multiple settings). But even after doing this, the stand pipe still overflows when I do a load of wash. The PVC pipe is about 2 or 2.5" thick, so I don't believe it's due to the pipe being too narrow to handle the volume of water coming out of the washer drain hose.
Based on what I've stated, does anyone have a feasible solution for this? I'm really tired of monitoring the washer every time I do a load of wash, as well as cleaning up water from the floor.