Blew up black tank!

[dfpartridge]

I use one on both the fresh and black tanks. That way I know exactly how much I'm putting into the black tank, and I also know how much I've used on the fresh side.

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Just curious....how much water do you use to flush the black tank? I just flush for about 30 seconds, then dump, then flush, then dump, until the water looks to be pretty clear. Is there a better way? Thanks!

[bertschb]

I assume I am safe to leave the valve closed as I monitor the volume of water and assume the tank vent does not allow the tank to pressurize.

You are correct.

If you want to see how effective rinsing is with the valve open, just open the valve and run the black tank rinse until the water runs "clear" (no solids). Now close the valve and add 20 gallons of water then open the valve. You'll see how much stuff was left in the tank by keeping the valve open during rinsing.

[bertschb]

Just curious....how much water do you use to flush the black tank? I just flush for about 30 seconds...

I add at least 10 gallons (with the valve closed) which takes way longer than 30 seconds.

[MoonShadow_1911]

Just curious....how much water do you use to flush the black tank? I just flush for about 30 seconds, then dump, then flush, then dump, until the water looks to be pretty clear. Is there a better way? Thanks!

Honestly, I haven't kept track of the amount of water. I just let it flush until the water runs clear.

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[NB Canada]

Just curious....how much water do you use to flush the black tank? I just flush for about 30 seconds, then dump, then flush, then dump, until the water looks to be pretty clear. Is there a better way? Thanks!

I fill 2 28 gallon waste tanks to empty the black tank then run the rinser until I fill another 28 gallon tank


2021 Imagine 2400 BH
2018 GMC Sierra 4x4 crew

[TGlock24]

I use one of these when I fill the fresh water tank; I never thought of using it when flushing the black tank....
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I use a black colored flow meter on the black tank line and a green colored one like in the link for fresh water.

[UGA4040]

I have never ran the black tank flush with it closed because of this pic. But everyone is saying it is okay to do as long as you don't overfill? It won't pressurize and come up through the toilet?

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[Ynot4me2]

I have never ran the black tank flush with it closed because of this pic. But everyone is saying it is okay to do as long as you don't overfill? It won't pressurize and come up through the toilet?

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That's a CYA label. It's easy to get distracted with the flush on and valve close and then....[emoji90][emoji90][emoji90]
I do it to properly clean the tank but if ever I forget then it's on me. Not literary I hope.

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[bertschb]

It won't pressurize and come up through the toilet?

The black tank is vented. You will only have a problem with the black tank if you close the valve then start the rinser and leave it rinsing until the tank fills up and stuff eventually comes out of the vent pipe on the roof.

[grassmaster]

[QUOTE=puffdaddy;380600]

1) I would expect the tank to be engineered to support the weight of a full tank....otherwise what is the point. Is the suggestion here that the tank expanded and the supports failed due solely to the weight of the full tank? Are the grey tanks prone to the same fate? Why does filling the fresh water tank to overflow (which I do) not result in the same consequence?

I was wonder that myself. Apparently there is no safety factors engineered into these things and are subject to failure even before reaching the intended load. I'm beginning to understand why RV veterans are jumping up and down, warning of catastrophic failure if a tow vehicle load even approaches the "door sticker" capacities.