There are many factors to take into consideration when designing a centralized, or slip-side pump out system layout for your marina.

1. Usage. Do you have liveaboards or long term transients that will need regular pump outs? If so, then you should have a central vacuum system with hydrants (suction ports) conveniently spaced near the finger piers to accommodate the use of a portable hose reel with sufficient suction hose length to reach the two adjacent slips in both directions. Take into account the possible positions of the boats pump out deck fittings for total hose requirements.If there are only few occasions when boats are occupied in slip and for short duration, or a pumpout boat is available, then slip-side pump outs are not needed. In that case, a dock-side, point of pump out will be sufficient. Located for convenience, usually near the fueling station or at the first point of your docks encountered on return to port. A pump out at your fueling area will increase your fuel sales as nearby residents with their own docks will usually fuel where they can pump out too, before returning to their docks. For this reason, even if you plumb your slips, you should include an accessible point of pump out for everyone’s use.

2. Marina Size. To operate a central pump out system that covers a large number of slips on numerous docks requires a lot of plumbing. Inside of that plumbing is a volume of air. The more air, the more dry run-time of your pump to remove it and maintain the best vacuum. If possible, the use of headers with isolation valves for each dock, or splitting the marina in half, or what ever is available, would reduce the length of suction piping being drawn on for any one hydrant being used. Shorter pipe runs mean quicker pump outs. Sometimes it is necessary to install more than one SaniSailor pump out system in the larger marinas. On occasion, a few smaller units are better than one, depending on the marina layout.

3. Piping Materials. Durability, initial cost, longevity, sizing, joints, turns, etc. There are many site-specific choices to be made. PVC or HDPE? Schedule 40 or 80? Elbows, wyes, or sweeps? Hydrant types and locations. This is all best left to the plumbing and pump out experts to recommend on a case by case.

4. System Location. Discharge is easy, suction is the art of the pump out. Laws of Physics are tougher on vacuum than on pressure. This boils down to placing the units as close to the docks as possible. The discharge line to the sewer piping, septic, or holding tank can run uphill or long distances as the peristaltic SaniSailor pumps are positive displacement. What goes in ‚Äď has to come out, and it is under pressure. Suction piping, however, is restricted by the total amount of vertical lift allowed by those pesky physics laws, and is further reduced by friction loss of the piping system.

5. System Operators. Will dock hands or Captains do the pump outs? On central pump out systems, there are nuances to operation that help keep your pump in optimal condition. These are simple things, easily practiced by a regular pumper. The once-in-a-while Captain will allow the pump to suck in much more air. Once the site glass on the suction nozzle starts showing that it is gulping air, you are done. Or, they may hang the hose in the water for cleaning and suck up sand and shells. Or, or, or…… Central pump out systems are for the well trained and experienced.

6. Hose Reel. Vortex is the answer. We all know that hanging loops of suction hose accumulates vertical lift, so we have always laid it all out flat on the dock, or should have. The same is true with hose reels, each loop on the reel adds up to more lift. EMP has patented the Vortex Hose Reel. You no longer have to unreel (then re-reel) all of the hose. Hook up the Vortex hose reel to the hydrant, pull off the amount of hose you need to reach the fitting on the boat, lay the Vortex back into the operating position, and pump away. By laying the reel back this way, the loops are now all horizontal. Hence, no lift. With this operation, your SaniSailor central pump out system is the most efficient it can be.

7. Options. RF remote control, hand-held or cart mounted, stanchions with low-voltage push buttons, key lock, token acceptor, multiple units or larger single system, high volume or average, etc. The best option! Let EMP, the pump out experts lay it out for you. We build the SaniSailor systems in many sizes for any application. Our worldwide experience is available to you.