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Old 07-26-2018, 06:09 AM   #1
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Black & Grey tanks full?

We have an MBS Isata FWS 24 and will be camping on our own property for 2 months as our 1930's seasonal cottage is demolished and a new modular home is swung in.

We have a dump station about 10 miles away so no problems there.

I am a boater and the Grey and Black tank gauges are never accurate , if they even work after a year or so.

I am guessing, but would a full grey tank show by water in the bathtub?

Of not, what is the clue the Grey tank is full?

TIA,
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Old 07-26-2018, 06:54 AM   #2
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The gray may backup into the shower first as that is the lowest I think I would use the gages/lights on the tank indicators until they proved to be wrong avoiding any nasty situations.
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Old 07-26-2018, 07:12 AM   #3
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Yep tank sensors can be inaccurate.... Black tanks can be especially worse since there's all sorts of stuff in them that can foul the tank sensors. Gray tanks are not as bad and have been very reliable on my Roo...

And yes, since your bath tub is the lowest point in your drain system, excess drain water should show up there first..
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Old 07-26-2018, 07:22 AM   #4
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Technically, if the water backs up in the shower, the grey's not just full, it's overflowed.

Since you're going to be camping on your own property, is there a way you can tie into your existing sewer/septic? Maybe through a cleanout? It'll save you having to drive 10 miles away every time you're full. Also, if you have a tie in, you can possibly just leave the grey open, (Not the black, never the black). That way you only have to worry about dumping the black when it's full, and it should be fairly obvious when flushing if the black's full.
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Old 07-26-2018, 08:51 AM   #5
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We have a Sunseeker 2400 for the 2 of us and the gray tank fills up pretty fast. I find washing dishes creates lots of gray water, compared to Navy showers. You could use paper plates and if your property is large enough, dump some gray around the place. Itís always shocking when the shower wonít drain.
I would try for a clean out, you could use it in the future for yourself and any RVing company. You might be driving that 10 miles more often than you like.
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Old 07-26-2018, 08:59 AM   #6
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Quote:
Originally Posted by FFred View Post
I am guessing, but would a full grey tank show by water in the bathtub?

Of not, what is the clue the Grey tank is full?

TIA,
You may hear a slight 'gurgling' or slowing down of the water flow when the grey tank is filling.

If you are hooking up to a water source on the property, you might try a hose end water flow meter to estimate your usage. https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Not an exact science, but if you know approximately what you're putting in the black water tank each day, the rest will be grey water.
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Old 07-26-2018, 09:21 AM   #7
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Quote:
Originally Posted by Nancyc7 View Post
We have a Sunseeker 2400 for the 2 of us and the gray tank fills up pretty fast. I find washing dishes creates lots of gray water, compared to Navy showers. You could use paper plates and if your property is large enough, dump some gray around the place. Itís always shocking when the shower wonít drain.
I would try for a clean out, you could use it in the future for yourself and any RVing company. You might be driving that 10 miles more often than you like.


Nancy, we use a tub in the sink when camping that collects the dish water. Then we just dump the dishwater just like any tent camper would. Saves the grey water tank for showers.
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Old 07-26-2018, 01:05 PM   #8
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Ok let me have it !!! LOL !!!

Is there a problem dumping Gray water on the ground ???
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Old 07-26-2018, 01:23 PM   #9
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Previously, most detergents contained phosphorous. Addition of phosphates to surface water can cause an algal bloom. This can reduce sunlight, which water plants need to survive. Those plants die, and the decomposers that break down those plants use a lot of oxygen. Without dissolved oxygen in the water, fish die off.
However, phosphates have been outlawed in detergents, except in special cases. Just make sure you arenít using dishwashing liquid or soaps with phosphates. If not, itís safe to dump that water on the ground. I would pipe it away from the trailer, as your sink water will still have food particles that can begin stinking and attract critters.
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Old 07-26-2018, 03:28 PM   #10
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Wolverine 1945 ... I agree with you on dumping grey water but once WildAggie spoke and put a crimp in that idea by adding food may be in that grey water and attract critters, well, now I am rethinking. Is it a good idea? Soap is usually in that mix, would that not deter critters?

FFred --- my gauges or lights haven't worked properly since end of my first season and yes the shower does fill up first or should I say, the water just does not empty out anymore once your grey tank is full. I have experienced it.

Now I empty grey tank on average every 3 - 4 days (2 people showering daily, washing various articles in sink daily, etc). It may vary by size of grey tank on RV verses individual usage.
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