Hey Guys. I have Horizon 350 MAG MPI FWC engines. I normally flush engines through the built in flush connections after closing the sea cocks as per manual. I want to start flushing with Saltaway. My question is: since Saltaway works in salt water as well, can i not close the seacocks and still flush the saltaway through or is there a problem with having two water sources feeding the pump at the same time? This would save a lot of aggravation by avoiding opening the hatch and getting into the bilge to close the valves each time.