Foam Bubbles coming out Speed Queen Washer drain hose - Fixed!

** Please read all of this first. **
We had a waterfall of bubbles coming out our washing machine stand pipe (drain pipe) and overflowing all the way down to the floor. This is how I fixed that problem. Our washing machine is a TC5000, made in 2020.
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Update. 3/2023: Thank you everyone for all your comments and questions. I'm glad I've been able to help so many people. Please know: I am not a Speed Queen rep or a repairman. I'm just a guy that came up with a solution to my problem.

Here's a lot more information and notes from me on this washer:
1. To flush all the residual soap out of your machine:
Do this: With an Empty washer. Hot Water. Heavy Duty cycle. No other options. Not Deep Fill. No soap. Let it fill. Pour a half gallon of white vinegar in right after it fills. Let it run. That should flush out most of the residual soap from the machine and your drain.

2. Here's some more of my thoughts for you . . .
* We add 1-2 ounces of white vinegar with every load we do. That has (pretty much) solved this issue for us.

* I want to add the vinegar so it's added during the rinse cycle. The Bleach Dispenser will add it during the wash cycle. The Fabric Softener Dispenser will add it during the spin After the wash cycle (so it's in with the rinse water). So, we add the vinegar to the Fabric Softener Dispenser.

* Never use the Normal/Eco cycle. That cycle does NOT have a Rinse Cycle!!!
Normal/Eco only Fills, Washes, Drains, Spins, and only "sprays" some water on the clothes while it's spinning. There is no second Fill and Rinse! So, there's still lots of soap in your clothes, and the machine! It's crazy.
Any other cycle: Fills, Washes, Drains, Fills again, Rinses, Drains, Spins.
You can also always use Extra Rinse if you want a 3rd Drain, Fill, and Rinse - to remove even more soap.

* Some cycles use a High Speed Spin, and some use a Low Speed Spin. I only get the bubbles when I use the High Speed Spin. I don't get many (or any) when I use a cycle with a Low Speed Spin. However, naturally, the Low Speed Spin doesn't spin-dry the clothes as well as the High Speed Spin. So, we keep using the High Speed Spin.
Heavy Duty & Bulky/Sheet use the High Speed Spin.
Perm Press and Delicate use the Low Speed Spin.
You can try a cycle with the Low Speed Spin and see if that works for you.

* Install the rubber adapter that came with the machine in the drain pipe. It might not do a tremendous amount of good, but having it in there to block some of the free, open air space can help restrict the bubbles.

* Most detergents are now much stronger than they were many years ago. They are all more concentrated. So, do make sure you are using less detergent.

Dryer Lint Trap: Here is the fix for clothes landing in the lint trap: https://youtu.be/uDmLQ7OT0Ww

Видео Foam Bubbles coming out Speed Queen Washer drain hose - Fixed! канала Rick's Tid-Bits