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 > Install cassette toilet, use black tank for grey water??

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Rbertalotto

Massachusetts

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Posted: 11/05/19 08:35am Link  |  Quote  |  Print  |  Notify Moderator

I almost never come close to filling my black tank, but I almost always fill the grey tank when boondocking.

I’m thinking about replacing the toilet with a cassette unit and using the black tank for more grey water.

Anyone do this?

Good idea?


RoyB
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JRscooby

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Posted: 11/05/19 09:09am Link  |  Quote  |  Print  |  Notify Moderator

My Dad had me add a extra line and a couple of valves to his grey tank. Open one valve, and the top forth of grey tank could drain into the stinky slinky. Close that, open another, and the top could drain thru a hose apron. Mostly he used it so he had plenty to chase the black, but sometimes would catch a bucket full and put it in the black.
Without a sewer hookup, he would do dishes in a pan, and MT the pan in the toilet.

ktmrfs

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Posted: 11/05/19 09:17am Link  |  Quote  |  Print  |  Notify Moderator

no need to add a cassette toilet to do this. If your tanks have a common outlet (very common), get a twist on gate valve. Then do the following

When the grey tank is full:
1) attach the gate valve to the dump valve, CLOSE THE GATE VALVE.
2) Open the grey tank valve, then open the black tank valve.

This will backflush grey water to the black tank and equalize the volumes.

3) once the tanks equalize, CLOSE both the grey and black tank valves.

you can continue to do this till both tanks are full.

4) when ready to leave, make sure both the grey and black tank valves are closed and using a small bucket at the twist on valve, open this valve to flush the gallon or so of water in the dump line and dispose of it.

5) remove the twist on gate valve.

I've done this for years. And actually I also do this when I dump easy way to backflush the black tank at a dump station.


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profdant139

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Posted: 11/05/19 09:22am Link  |  Quote  |  Print  |  Notify Moderator

Here is my very low-tech solution -- when the gray tank is nearly full (after five days of camping), we fill an ordinary bucket (not too full!!) with gray water and then carefully carry it into the bathroom and dump it down the toilet.

Since our black tank has way too much capacity (25 gal, same as the gray tank), we "borrow" the capacity of the black tank.

This method is tedious and slow -- the bucket only holds two gallons without risk of spilling. And it has to be done carefully -- don't want gray water on the floor of the bathroom!

But the advantage is that this method works without any modification of the plumbing.


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Rbertalotto

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Posted: 11/05/19 09:31am Link  |  Quote  |  Print  |  Notify Moderator

All of those solutions would work.....but not the way I want. Dumping the grey water is never an issue as most places I stay allow grey water to be dumped on the ground or in the woods.

I rarely use the camper at campgrounds. Mostly at Cowboy Action events, motorcycle events or other events.

I can not mix grey and black and then dump on the ground. So I will still need to find a dump station.

The cassette toilet lets me dump onto a ports potty or gas station bathroom. Convenient.

And. I can use the cassette toilet on my boat and when I’m using my rooftop tent.

My main concern is how well a cassette toilet works in an RV...Oder? Ease of use? Etc...

pianotuna

Regina, SK, Canada

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Posted: 11/05/19 09:48am Link  |  Quote  |  Print  |  Notify Moderator

No reason to not use the black tank for grey water--but I would still dump it at a sewer for a long time before I dumped on the ground.

Some folks have installed pumps to transfer grey to black--or even to flush the toilet.


Regards, Don
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2oldman

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Posted: 11/05/19 10:19am Link  |  Quote  |  Print  |  Notify Moderator

5 pages of 'cassette' search are available.

Trekkar

Michigan

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Posted: 11/06/19 09:56am Link  |  Quote  |  Print  |  Notify Moderator

Rbertalotto wrote:

All of those solutions would work.....but not the way I want. Dumping the grey water is never an issue as most places I stay allow grey water to be dumped on the ground or in the woods.

I rarely use the camper at campgrounds. Mostly at Cowboy Action events, motorcycle events or other events.

I can not mix grey and black and then dump on the ground. So I will still need to find a dump station.

The cassette toilet lets me dump onto a ports potty or gas station bathroom. Convenient.

And. I can use the cassette toilet on my boat and when I’m using my rooftop tent.

My main concern is how well a cassette toilet works in an RV...Oder? Ease of use? Etc...


We've used a cassette toilet for over a year. Smell has not been an issue in the rig.


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Rbertalotto

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Posted: 11/06/19 10:49am Link  |  Quote  |  Print  |  Notify Moderator

Thanks...that is the feedback I was looking for.

Now I need to decide on what cassette toilet to buy.

JRscooby

Indepmo

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Posted: 11/06/19 12:29pm Link  |  Quote  |  Print  |  Notify Moderator

I have always called a cassette toilet one where the bowl and stuff where built in and a small black was removable. If you want to move the whole toilet to another vehicle, you want a pota-potty.
You dump grey in the bushes? Why not just use one of the caps that connects in place of the stinky slinky, and has a hose bib?

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