We were given an Amana NAV2330AWW washer. Although we love it, the drain in the wall "bubbles" out soap and water. The drain overflows. We never had this problem with the previous washer in the same drain. We have tried using less soap than normal and it still happens. The overflow water has ruined the drywall on the walls.
My husband knows quite a bit about plumbing and is unable to determine the problem. Nothing is clogged.
Any suggestions would be appreciated.
Thank you.