How often should you replace your sump pump and ejector pump?

You should test them by pouring water either by bucket or hose twice a year. I'm not sure about "at least" ten years but as long as it keeps working every test it should be fine

They are usually good for about 7 years. I know the one US Waterproofing put in will last at least 10. They replaced the one with the same unit that was there for 13 years but I replaced it when we moved in to be safe.