Hi George,
I have e-mailed eheim and it took about a week before they responded. As far as your 2224/2227 filter you can purchase the accessorries at bigals.com
you are looking for the intake & outake tubes. The numbers you are looking for the istallation kit for intake is 12/16mm 4004300 & 12/16mm outake spray bar kit is # 4004310. It makes it so easy to prime with both of those.
Hope this helps
Teresa