Installed a new washing machine today. When draining, water comes up and out of the top of the drain pipe. The drain pipe is 26 inches long from the bottom of the pea trap to the top of the pipe that the washer discharge hose enters. The pipe is vented on the other side of the pea trap and just above the vertical drop part of the drain that leads to the main discharge line from the house . The drain runs clearly and I snaked it to be sure. I am wondering if the volume of water is to great for a 26 inch long drain pipe. Would extending the washer discharge drain pipe another 6 or seven inches keep the water from spilling over the top. I am also wondering if the vent is to close to the exit of the pea trap and the vertical drain. This second item would be a real pain to change. I occassionally had this problem with the old washer, and I am getting tired of cleaning water up off the garage floor. Any ideas?

What is the current feeling on the "best" way to install heating circulators? On the Feed side or the Return side of a loop system.