holding tank

[Mickeyh]

does anyone know if it is possible to mount a tank 4ft above the electric toilet or would there be a problem with the hose between the pump and tank holding waste ??

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[Trevethan]

From a lay position (You should really talk to HeadMistress about these things),

I would say in pronciple, if your pump can deal with that kind of head of water, .no not a problem.
Obviously you would have to enter the tank from above.

BUT Question is why? holding tanks are smelly horrid things and belong low down in the boat I reckon. Putting lots of smelly semi liquid, high up where is can slosh around is a bit of a recipe for disaster I think.
Also the pipe up t e the tank will always has foul water in it and will start to stink.

Go with a lower tank or those saddlebag style thingies that can put around the loo instead.

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[HeadMistress]

I agree with Trev...it could work, but I don't recommend it. For one thing, you'd have to flush a long time--which would fill up your tank with flush water very quickly-- to make sure that no waste is left sitting in the line to run back into the bowl. For another, unless you have additional room above the tank for a loop, heeling is likely to send waste in the tank back into the head discharge line...and unless you replaced the joker valve almost monthly, could result in bowl overflows.

Find another location within 6' of the toilet that will allow the tank to be no more than about 1' higher than the toilet.

<hr width=100% size=1>Peggie Hall
Specializing in marine sanitation since 1987

 

[mhouse]

Contary to the other posts , I have done just that with no problems over the last 2 years. The normal manual pump on my toilet works fine without having to use excessive amounts of water. It works like an air lift so when finished a couple of suift strokes of air and you can here the waste entering the tank. On the plus side of having the tank above the waterline is to discharge at sea you only need to open the outlet valve and a discharge pump is not necessary.

Matthew

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[Steve_N]

The brand new HR35 we chartered last year had an arrangement just like that: tank about 4ft. above the toilet, but manually pumped like Matthew describes. The HR36 we loked at was the same too. As described there was no pump to pump out the tank - just open the seacock and let gravity do the business.

And the tanks were stainless steel also - that's a no no surely?

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[HeadMistress]

Yep...a no-no. Costs at least as much--usually more--as a good quality plastic tank...has a life expectancy of 2-5 years before urine eats through a weld at a seam or fitting, about 10 years before urine turns the whole tank bottom into a collander.

<hr width=100% size=1>Peggie Hall
Specializing in marine sanitation since 1987