Why would you run a water line directly into the tubing on your canister filter? I don't recommend using that method as there is always the possibility of cross contamination of your potable water system.
Why not just run a separate line to the tank?
Deeda can you please elaborate? I don't quite understand what you mean by this. Perhaps you mean the tank/ canister water could leak back into the house's water supply?
Don't a lot of people with sumps use such a strategy with continuous drip systems?
Thanks in advance.