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Priming Head Pump Out Hose
I was first taught to place the pump out hose in the water (bay) to prime it before putting it in the discharge of the boat. I have also read Pump Out instructions that use the same technique. It immediately occurred to me that this technique defeats the purpose of having a holding tank, as you are introducing sewage and bacteria into the Eco system (admittedly a very minor amount). In fact, I would think it's probably illegal. In addition, I didn't understand how this was priming the system, as you would break the prime by moving the hose from the bay to the boat. I guess you could close the valve on the hose, but this wasn't what I was shown. I soon figured out that if I topped of my holding tank with fresh water, I could "prime and pump" in one step, and keep the hose out of the Bay. In addition, this method dilutes the holding tank, which I assume makes pumping more efficient (certainly can't hurt). Am I missing something, or is this the way most people pump out?
Last edited by L124C; 04-21-2010 at 12:25 PM.