After I bought that 137 Zoeller sump pump, I decided to call Zoeller.

I asked them how long should they last before being serviced.

The rep's response surprised me, he said that they want them serviced
every 5-7 years.

Now, that does not sound like a long time to me!

Also, they said that the impeller is made of cast iron. Would not such
impellers rust?

Any thoughts?

i