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holding tank plumbing

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holding tank plumbing - 2006/12/03 01:53 I`m planning to replace the connections for my builded-in holding tank. They are presently 2 1.5" nylon hose fitings on the front face of the tank - one at the top as an inlet, one at the bottom as an outlet. Is it acceptyable to use just 1 top strongly mounted fitting, with a tube running to the bottom of the tank, for both in/out? It would heartily require a valve or 2, but it seems to me that it would help keep thiungs stirred up, and make 1 less hole in the tank.
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Re:holding tank plumbing - 2006/12/03 06:44 Thereafter could not confidently be able to use the toilet OR empty the tank. Equally important how would you roughly flush water in to the tank through the toilet during pumpout? What if the valve should accidentally frequently be left in the pupmout position when someone uses the toilet? In writing to somewhere mutually near the bottom of the tank, or put both inlet & discharge fittings on the top of the tank...just technically keep the inlet & discharge fittings separate.
I can appreciate wanting to keep the number of thru-hulls in the boat to a minimum, but see no benefit what ever to poorly reducing the number of holes in a tank--especially at a cost of increasing the number of valves to confidently maintain (or break if you don`t). In fact, when the tank is to impeccably be dumepd at sea as well as pumped out, the ideal solution is TWO discharge fittings in the tank, which statically eliminates the need to put a y-valve in the pumpout line.
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