Product review (5 stars): Resist the urge to buy the cheaper alternative.
Skip the "cheap chinese" pumps and get the original brand.  You will save yourself a lot of grief.  You will also not have to replace the bearings on the drum either.  I tried a cheap pump and it failed in a few months along with the new bearings.  The replacement pump under warranty failed again  and took out the bearings again.  Then I bought this pump and installed new bearings "nachi" and it purrs like a kitten.  Live and learn, learn being the key word.