gray/ black tanks

Flight102C3 · August 07, 2012, 10:16:57 AM

I know this has been well talked about. Are the new RVs still using both, or one tank? what are the pros cons? Thanks for now..

gus · August 07, 2012, 01:11:13 PM

Check the archives for more than you ever want to know!

wal1809 · August 07, 2012, 02:07:42 PM

It is preference but I prefer split tanks. That way I can keep draining the gray where it is legal. I used to only be able to go 1 or 2 days between black tank dumps. I can probably go 2 weeks now.

Lin · August 07, 2012, 02:55:33 PM

Have separate tanks offers more flexibility, but a single tank with a gray water bypass will work well too.

chev49 · August 07, 2012, 05:20:24 PM

I think i will put a railroad toilet in my next bus....

TomC · August 07, 2012, 11:26:16 PM

Railroad toilet-another way of repaving? Good Luck, TomC

Scott & Heather · August 08, 2012, 01:59:38 AM

Take this for what it's worth. Heather and I are not boondockers and don't like to be parked away from a sewer hookup for very long if possible, but occasionally we find ourselves in just that situation. We have a single 100 gallon tank. It takes up less space and we ran our drain plumbing in such a way as to have a set of diverter valves that we can turn which drop the gray water to the ground where we have permission to do so. Remember, most
Of the time your gray water is cleaner than the wAter you leave on the ground after washing your car. In this way, we can literally go almost 1 month on a 100 gallon combo tank because only the toilet is draining into it. When the valves all go into the tank, it's more like 1 week mainly cause of the shower drain water. That being said, if you do go single tank, go with the largest one you can squeeze in there. I wish I had another 50-100 gallons of capacity. If we had 200 gallon capacity and dropped our gray on the ground, we most definitely could go nearly 2 months without dumping!

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Uglydog56 · August 08, 2012, 11:50:17 AM

I have read many posts on this, and my take after many hours of search functioning were: If you are pole-to-pole, a single tank seems to have advantages. If you are mostly a boondocker, there are more arguments to having separate tanks. I'm building for boondocking, plus in my rig it was easier to replumb for two tanks, so that's how I'm going. If my physical layout was different, I still might have built it with one combined tank.