Uh-h. Hi Pappy. Didn't pay attention to who was posting.

The Whisperflo IS too big, but you should be able to run it on low, virtually all the time. You'll probably need to put a throttling valve between the pump and filter. If you adjust it to avoid excess flow on high, it will have no effect on low, but will keep you from accidentally blowing all the sand out during backwash.