It will be fine in series, and some people think the pump is too quite
http://forums.procooling.com/vbb/showthread.php?t=11682
Most European kits use G 1/4 fittings, but check there WEB site.
If you want G 1/4, think we are the only ones that have stock in North America for standard MAG.
There is a special versions for Fluid XP, they have G 1/4 ports as well.
Danger Den has MAG's in stock, but they have there own fittings.
Dave
C-Systems Support
*Checked there WEB site, and it shows that pump has G 1/4 fittings