I have a question about the discharge piping for a wash machine. I purchased a house that I will be using as a rental property. The house was a foreclosure that sat empty for 7 years. I happened to bump into the last tenant while I was there working and he told me that the landlord didn't let him have a washer or dryer for all the years he was living there. In fact, the area in the photo was actually walled off. I plan on giving my wash machine to the new tenants. I know that when the water is discharging out of the machine into our slop sink at my home, it really comes out at a high volume. My concern is that the water won't be able to drain down that pipe quickly enough and that it will come pouring out the top. Is my concern valid or am I overly nervous? I've poured water down the pipe and it drains fine. Would a taller pipe be better? There's no room for me to put a slop sink there. Any advice?

I'm putting this in the plumbing section rather than the large appliance section, because it really has nothing to do with my washing machine, I hope that's ok. I needed to replace my washing machine drain pan, as the old one had gotten cracked pretty badly. Anyway, the drain that was connected to it was a metal threaded drain that basically just screwed down onto the pipe, kind of securing the drain pan to the floor. I can see there was some sort of silicone gasket or caulking of some sort underneath it at some point, but that had deteriorated for the most part. So the drain is in good condition, and easily reusable, plus I don't think I can find another one like it anywhere, so I measured and cut the proper size hole in my new drain pan to place it and screw the drain on. And it works just fine. However, I'm a little worried about not having a good seal under the lip of the drain, so some water can get underneath it and drain down outside of the pipe. I can't seem to find a rubber gasket or washer with a 2 inch inner diameter that this drain has. I found a rubber washer that had a big enough outer diameter, and for now I have cut out the inside of it, making it kind of fit. But it is a bit thick, and I'm not really liking the seal it made. Does anyone know the proper way to seal the lip of this drain? I imagine caulk would just break loose as soon as the washing machine was moved or replaced, because the drain pan will twist around a bit, so I don't want to use calk. I've only looked at the hardware store. Would a plumbing supply shop be more likely to have the right size washer? I'll include some pictures below to try to clarify the situation. The rubber washer you see is the one that I have cut up to make fit. But it's a shy too small and doesn't fit on very well. Any advice would be appreciated. Thanks! Here is the drain pan: [IMG]https://i.imgur.com/bwYLvtc.jpg[/IMG] I backed the drain out a bit so you can see how it fits. But it doesn't fit very flush to the floor. I know it won't with a gasket, but this one just doesn't fit quite right, and is a bit too thick: [IMG]https://i.imgur.com/7mANX1b.jpg[/IMG] More images of the drain: I took the washer off in this one so you could see the whole drain without it.