How much liquid will cover the bottom of my black tank?

[1kennyOG]

Just in general I know tanks are not all the same size but I have a 21' HTT the black tank is 22 gallons.

I want to keep some liquid in there sloshing around when I travelling (after dump) how much do you figure would cover the bottom?

[1kennyOG]

today 20 seconds filled my 2 gallon jug so 2 minutes is a good amount. I figured 5 gallons would be a minimum but of course that puts me 1/4 full.

[Pangaea_Ron]

One gallon of water covers 231 square inches of the bottom of your tank (1 inch deep).

How large is your black tank (length and width in inches)?

[poppin_fresh]

It will take quite a bit to have some cover the entire bottom IMHO.

I have one of those rv black tank flush devices that allows you to back fill the tank with water from the outside. Because of the way the tank pitches towards the outlet, it actually takes a good minute or two before you fill the outlet pipe with water. Then...and only then... will water actually be making it's way back into the tank.

One gallon added to the tank will most likely all flow down towards the dump valve and I would doubt that a typical drive would slosh it back into the tank enough to do much good.

[1kennyOG]

thanks but I sell plastic buckets, you don't want to know how many different sizes I have available LOL :B

Trackrig wrote:
Put a bucketful in, whatever size of bucket you have handy.

Bill

[dadmomh]

After dumping, I have always gone ahead and put in whatever black tank treatment we're using, normally Odorlos, and add about 5 gallons of water. And let it slosh. If it's a longer period between trips, when we start out again, I'll go ahead and add some more treatment. We're minimal with the FW tank - since we rarely use it - but generous with the black tank water.

[Trackrig]

Put a bucketful in, whatever size of bucket you have handy.

Bill

[OpenRangePullen]

I would give it 2-3, black tanks are usually flat and pancake like and have a lot floor (or bottom) space.

[camper19709]

I would say 1 gallon.