that's no different than the pump in a sump running dry if the siphon breaks.foldem;4451529;4451529 said:I would be worried about the siphon breaking and then your canister will be running dry.
Pharaoh;4451724; said:Are you talking about an in-tank drilled overflow box, or are you talking about an HOB overflow box?
If it is a drilled box, a canister will work.