I use the Fleetguard WF2071 also.
BTW, set it up on a "By-Pass" system.
Years ago the nite I installed my water filter system it was about 0*F & I was using a friend's shop about 40 mi from home. Got thru, headed home, & had NO HEATER! I had installed it "in-line" in my heater return hose.
Was a few days before I figured out what was wrong & redid it correctly.