Nethery's Appliance Repair - Nethery's Appliance Repair ran across this peculiar problem today. The washer drain had been siliconed into the standpipe to keep the water from overflowing. That worked for a
Standpipe for the Clothes Washer - Inspection Gallery - InterNACHI®
McAlpine Washing Machine Stand Pipe WM3
1½" Washing Machine Standpipe Trap - WM3 - Plumbing & Heating from Build and Plumb UK