utility sink pump
Whatever type pump you buy and install, I would suggest using something to "filter" the washer discharge water. It contains LOTS of lint which will cause problems down the road. Simplest thing I have seen/used is a knee-high nylon stocking. They are cheap and disposable. Secure one with a clamp on the end of the discharge hose and when it gets full of lint, pitch it and replace with another one. For those reading this post that do not discharge the water into another vessel (utility sink etc), do not install these on your hose and drop it into the standpipe. Should it fall off, you will be trying to dig it out of the trap, which is not a fun project. Being in the standpipe also makes it non-visible and if it fills up, the water will backflow and flood the area.
If you have never made a mistake, you haven't done much.