black/grey ratio to freshwater

[bagmaker]

Hadn't thought of getting a second cassette for the toilet. Don't have a grey water tank yet, but the two lean mean pissing machines that Katherine and I have got can fill a cassette in no time

Less beer.

no.
Wrong.
Go to the naughty corner for even suggesting it

ratio seems about 20% blackwater capacity compared to freshwater available.
that would make greywater capacity about 80% of fresh capacity in a perfect world

[bagmaker]

Just want to bump this along and see if its still accurate......

[Jon and Kay]

Sorry William, you have the wrong toilet. You can use domestic fridges, freezers, drawer runners, aircons...but not domestic toilets. An RV toilet uses 1/2 litre of water per flush compared to 3 litres to 9 litres for a domestic loo. To keep your current toilet, drop some 'fill' into the cistern without disturbing its operation (say some house bricks or lucky stones to reduce the flush to less than a litre.

There is no comparison to water tanks fresh/grey.black.

You need as much fresh as you can get within weight considerations. Grey water isn't a great issue....we drop it on the ground most places and otherwise wait to dispose with black water. Black water, we have 180 litres ... three weeks between dumps, but will not have anywhere near the amount of liquid as yours as our flush is less, so you would have to currently dump more often.

Start by reducing your flush water volume, it'll make a huge difference. NB...2 ply toilet paper from the supermarket, add some to the pan before use to compensate for using less water and still keeping pan clean.

[bagmaker]

He he, not William........?

I reckon there must be a ratio that can be figured but perhaps, as usual, I am not explaining myself...
We all have tanks, fresh, black and grey. (some have other tanks but keep it to these 3)
We all have a number of people on board.
We all use our "systems" to a certain extent, some use public / CP as well.
The questions are, how much fresh, grey and black do you have?
What runs out first?
What would you have more of or less of in comparison to the other.
Of course it would be nice to have endless fresh but thats not the question, I am trying to figure the best size of my grey and black for a limited freshwater storage. The perfect amount in each would mean they are both full at the same time and the freshwater just ran out

Thanks for your input

[Dot]

I would have as much fresh water space as I could (depending where you are going) We keep an eye on the grey by looking at the gauges and get rid of it at every opportunity even if only a few lits in it as it gets to stink and why cart yucky water around? Ratio dunno, maybe 10lts pr person pr day ? that is extravagant I guess but that is for everything incl cooking, shower/washes and even laundry.. I have been told that to stop streaks at bay spray bowl with cooking oil spray?? or you could use those dunny liners !!

[Jon and Kay]

Dot....toilet paper = dunny liner. Just make sure it's 2 ply.

The way I see it,
black can go into grey
grey can go into black
fresh can go into grey or black
Only fresh can go into fresh.

My anecdotal evidence over 9 years for 2 people full time, no public toilet use, is thus...

black 180 l = 3 weeks
grey 180 litres = 5 days ....but usually emptied daily
fresh 400 litres...but with a 300 litre in the Toad and 30 metres of suction hose and its own pump, has never allowed us less than 50 litres per day around and around Australia for 9 years.

[BernieQ2]

We only use 3 ply .
Bernie .

[Busman]

Wayne look at my comments on thread earlier, how we are changing our requirements as experience dictates.
e.g. Some at EL were happy wit cold showers, May had one and said NO thanks ! Me didn't even try, had too many in this mans army

[native pepper]

We have 380lt of fresh, 40lt of filtered drinking, 100lt of grey and 50lt of black. We use the grey water to flush the toilet and can easily last 2 weeks without emptying or restocking, showers use 10lt.

[bagmaker]

Busman I have you down as
750 fresh
250 black "always has room"
250 grey "quits first"
and have "adjusted" your ideal size to 475 grey and 200 black.
Do you think that is OK? I reckon there is probably a top limit of 300-400 of grey just cause its silly to carry that much around but as a ratio to your fresh, thats what the maths say.

Pepper I will put you in the mix, what tank space do you run out of first?

Cheers Bagmaker