larger then 2" standpipe ?

I was wondering if making the standpipe larger the 2" will help eliminate overflow.

Maybe 3" of 4 " to hold more water.

In what I have read in the paste 2 days it appears that the problem with overflow is that to much water is getting pump into the drain.


Any feedback ?

In what I have read in the paste 2 days it appears that the problem with overflow is that to much water is getting pump into the drain.

Click to expand...

It is not how much it's how fast. 2" is what you want.

Newer washers are designed to pump the water out of the machine faster than a 1-1/2" drain can handle the volume of water. These machines are designed to use a 2" drain so he solution is to use a 2" standpipe and p-trap. It would not help to use a 3" or 4" standpipe if that was then reduced to a smaller size. You never should reduce the size of a drain on the way out. A constriction like that would be a spot that could clog. A 3" standpipe and p-trap that continued in a 3" drain or expanded into a 4" drain would certainly work, but it would be overkill.