When we bought our house it had a pump that worked (and still is), we are just not sure how long it will work for so we started researching options. I will look for the one we found (I changed email servers and can't find it), it was a submersible that could be auto drained in colder weather. We found it at Cottage Life, but it is no longer listed, below is the Cottage Life link to the products page, it may be of help on this or other projects.
http://www.cottagelife.com/index.cfm...1/level/3.html
Also,
For the fittings we used these, they are great!
http://www.cottagelife.com/index.cfm/ci_id/1383/la_id/1