"What if you get a call and washer wont drain on a duet? You bid $75 to go out and clean out a pump but find out the impeller is spinning free on the shaft of the pump and pump needs replaced? You just screwed yourself if you replace the pump because your locked in at $75.
Another option is to replace the pump with one of these WH23X10030
Virtually all of these pumps are the same. The difference is:
1. The pump body. How often does that break?
2. The height of the impeller. There are two varieties, tall, & short.
3. The way it connects to the pump body. Almost universally, they are connected with screws.
The above is a short impeller pump. Here is a tall impeller pump: 4681EA2001T
Keep these two on your truck, and you can replace virtually any type of pump.
You also save hugely on the pumps that cost $150!