Just speculating at this point, I really didn't expect any other answer about the relay than what Mark and Robert replied with. So Step 1 would be to develop a circuit to run the pump. That is fairly straightforward. I guess the next step would be to investigate driving the circuit with some software. This is where I really need a test bench. I guess first I will start playing with software. Stay tuned for the next installment of "HMMM will this work?"