The Cam-Lock adapter threads onto the inlet and/or the outlet of the pump, the coupler hose barbs fit onto the hose, which can then be easily attached to the adapter.
All cam-locks are made of aluminum.
ALCAM3A Adaptor 3” Male (IPT)
ALCAM3C Fitting 3” Hose Barb Female Coupler
ALCAM3E Fitting 3” Hose Barb Male Coupler