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I am assuming there is always sediment in the bottom of the graywater tank.. can i just run some water with a hose down the sink drain and keep the graywater tank lever open and just run the water thru? I would like to keep it as clean as possible ..
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Here's my method.
This works because I can empty the gray water tank in my driveway, it just runs down into my hay field.
I connect a hose to the "city water connection" using my household water.
Remove the gray water cap, and open the gray water. Let it drain.
Then turn on the faucet and let water go through the sink into the tank for bit.
Then close the gray water valve while the water is still running inside the trailer.
Wait until water comes out the gray water tank overflow.
Open the drain valve again and let the tank empty. (This also flushes any residue down the driveway and into the field or storm drain)
Close the valve again, water is still running inside the trailer.
Let the tank fill again. Empty and it's all rinsed out, the residue is rinsed away.
If the tank appears to have nasty looking stuff come out on the first draining, on the second filling I'll pour a couple cups of bleach down the drain. When the tank starts to overflow I'll shut off the water and wait an hour or then drain the tank. That should keep more stuff from growing in the tank.
I usually leave a bit of clean water in the tank when all finished, maybe a gallon or so. This helps keep thing diluted a bit.
Byron