I wished I had taken a photo before posting, so I've drawn up some diagrams. I have a strange problem with my washing machine... Below is a diagram of my washing machine. The blue pipe is the houses 'drainage' pipe. The yellow tube is the washing machines drain tube. and the red tube is the A/C humidifier's draining tube. The problem I have is, when the washing machine goes into its final spin, the suds get backed up a bit in the tube. This isn't too big of a deal, except the A/C tube is breaking the rubber seal that is on the end of the washing machine hose. This image shows what is happening inside the tube: From the top view: The purple shape is the rubber end of the washing machine hose, that is supposed to make a seal in the drainage pipe, but since the A/C tube (in red) also goes into the same pipe, it crimps the washing machine seal and the suds back up and come out through the opening that are created by the A/C tube. Hopefully all that made sense I've tried using less soap, thinking it was too much, but the same problem occurs. It's a new washer, so there's nothing wrong with the machine and all of the settings are 'normal'. Last night I took the A/C tube out (so the rubber seal would completely seal the tube) and while there was a slight bit of suds coming through, it was no where near as much as with the A/C tube in there. I was going to check at Home Depot to see if I could either plug up the gaps in the rubber seal or find another seal that has two holes, one for the washing machine tube and one for the A/C tube. Does something like that exist? I was also thinking of slicing the rubber tube slightly so the 'gaps' aren't as large. Ideas? p.s. There's no where else to run the A/C tube, so I'm stuck with both going into the same tube.