Quote:
Originally Posted by Ali88
We don't have a washer and learned that if you just leave both tank handles pulled out in the open position, they will level off and hold 80 gallons vs. just 40 for the front tank.
Ok, you got me, what do you mean, leave your handles out in the open position, would this not drain your grey water tanks?
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Navy LCDR explained what I have done. The 3825fl's have two grey tanks that feed into the main drain where the black tank also drains. Instead of keeping all three tanks closed. You just keep the black tank closed and the other two grey tanks open. If you keep that back grey tank closed, all of your shower water and sink water goes into just one 40 gallon tank. I suppose if you are at a campground, that doesn't matter since you can just pull the handle and dump it when it gets full. We are set up on private property with no place to dump our tanks. We have to utilize all three holding tanks and then transfer the contents using a method I learned about on You Tube, where we attach a macerating pump to the drain and pump the contents of the three tanks into a 100 gallon heavy duty bladder that is sitting in the bed of a truck. When it gets full, we close the valves and haul it to a local RV campground, where we pay $8 to dump it.
So in our situation, we need all 80 gallons of the two grey/galley tanks. With the rear grey tank lever closed, the front tank quickly fills. With both handles pulled out, and the optional waste valve closed to prevent anything draining, grey water will flow into the front tank and then drain out of it towards the main drain and then flow up the line to the rear grey tank. They will level off as they both fill.
When it is time to empty all three tanks, you close the two grey tanks, attach the accordion hose to the main drain, and open the gate valve and drain the black tank, followed by the two grey tanks. When finished, you close the gate valve, the black tank, and open the two grey tanks again.
In our situation, we do not use the accordion drain hose. Our 3825fl is staying put until September, and we don't own a truck to pull it to the RV campground. We ordered a 2022 Ford F-350 and do not expect it to arrive until October or November. Therefore, we use a method where we attach a macerating pump to the gate valve, attach 20 feet of one inch hose that connects from the pump to the 100 gallon bladder, that also has an additional 12 foot 1.5" hose coming out of a second valve used to drain the bladder at the RV campground. We just attach a long power cord to the two six volt batteries to power the pump, which has a hand-held remote.
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