Oliver, 

Could you show us a photo of this setup? A picture is worth a million words.

My second Flojet pump just died. With two fridges and a freezer running, the lifetime is 6 months, max. Upon disassembly, it appears the brushes have worn out and the commutator is heavily scored - looks like the Grand Canyon. I would love to retain the diaphragm pump but replace the motor as you have.
--
Scott 
2007 A54 #69
SV Tengah
http://www.svtengah.com