On Mon, 30 Jan 2017 04:14:02 GMT, Nancy
m wrote:

Stand pipe now is 39'' from bottom of washer. It overflows, so how many feet
should I raise it? or is getting a smaller hose better to control the flow?

Snake it. Making the pipe higher won't do much if it is clogged and
that sounds like the problem. You might even be able to blow it out
with a hose and a 1.5" to hose fitting adapter. (assemble a few PVC
fittings)