are you sure you have the cartridge installed right side up?
mine is a thread in fitting that the line screws into.... and the drain has the 2 bolt flange....
https://quickserve.cummins.com/qs3/.../t/10.06.2/tp97047-08&header=false&print=true
mine is a thread in fitting that the line screws into.... and the drain has the 2 bolt flange....
https://quickserve.cummins.com/qs3/.../t/10.06.2/tp97047-08&header=false&print=true