Do I have to run 1.5" vent/drain for my liberty 404 sink pump?

[cbehr]

I recently purchased the below pump for a bar sink in my basement. It will not be used very often and will pump up about 8 feet. Can I go smaller than the 1.5" holes in the pump? I was thinking of trying to reduce to 1.25" to try and get the plumbing into my ceiling easier.

http://www.libertypumps.com/Products/Category/SubCategory/Product/?p=19&s=8&c=24

 

[Tom Sawyer]

If you can find 1-1/4" pvc you can use it.