"Once upon a time" trailer manufacturers matched fresh water storage to discharge storage. Then they found out, some people NEVER filled the gray tank because they never took showers inside the trailer, nor did dishes inside the trailer. BUT boy did they fill up (over flowed) the black water tank because "they" drank cheap beer.
There's never a perfect solution. It's UP to the owner of any given trailer to monitor their tank usage. THAT's why there are commercial blue totes, home-made blue totes and full hookups... it's all about leaching off the tank that's full.
Remember, a US gallon of water weighs 8.35 lb (about 3.79 kg). Travel with empty tanks (save fuel) and pay attention to your discharge tanks and you are GOLDEN.
Our 2011 5.0 has the 26-gallon grey tank. I had Larry at Little House Customs install another 13-gallon tank "in parallel" for a total of 39 gallons. For dry camping, that made a huge improvement for us.
I believe Larry verified the same mod is possible on the 19. Of course, he's in Texas so it doesn't help you. You might want to call him to discuss it. He might be able to talk you through it long-distance.
2016 Escape 21
2016 Ford F150 EB
How do you get the flow to stop when the 16 gallons in the Casita tank hit the 7 gallon capacity of the blue tote?
Sounds like it could get ugly.
I stand there and watch the blue tote fill. When it gets close to 3/4 full, I shut the gate. I've used this many times in the past five years of so of ownership. Works as it's supposed to. Since I'm a single traveler, I've even gone home with (reasonably) full tanks after camping and just dump everything down the home hopper. I'd rather do that (sometimes) than wait in line at a campground dump station when the line is looooong.
On our last trip out last week I found that the black water drain valve has a leak. When I removed the cap a big splash of very bad water came out. After a good triple flush I put my hand up the pipe to where the valve is and discovered that the rubber seal has dislodged from the flange. So it is in need of replacement. I found this video on YOUTube that explains the how-to. Oh joy.
We have also had a splash of water when removing the dump cap. We assumed something was broken or cracked. We had a big can to catch the splash for maybe two days and then it was all back to normal. We were miffed but believe that it had something to do with a previous sewer dump spot that was higher than our dump valve. We have come across that problem several times. It also may cause a bad odor inside the Escape temporarily. It is probably just not completely dumping.
Yours is obviously a worse problem. At least you have determined the cause.
Cathy. Floating Cloud
"Live in the sunshine, swim the sea, drink the wild air.... "
Ya , we were dry camping for a few days and the tank was 3/4 full . It was at a sani dump the leak was apparent. I wasn't prepared for the splash and of course there was someone waiting and watching. It's a fix that can't be put off. On the 17' the black and gray tanks have a "Y" connection so both valve assemblys have to come off together. Not a 5 min. job.
I've almost been everywhere man.
Almost been everywhere.....