Soraya,

I can say that the March Brushless won't work if you're cooling the fridges with fresh water. I switched to a Marco UP2A (Correction: UP2-P) pump as you can replace the brushes/seals for cheap and they seem to meet my requirements: low draw and 4L per minute at 12v.

--
Scott 
2007 A54 #69
SV Tengah
http://www.svtengah.com