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Old 05-03-2012, 09:23 PM   #1
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Question on holding tanks

New to RV ownership. Should I keep water in the holding tanks between usage? If so, how much?
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Old 05-03-2012, 09:30 PM   #2
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I empty the tanks, close the valves and put about 4 gallons in the black tank then add 1 gallon with the chemicals. That's enough water to flood the valve and bring the water/chemical level into the tank and above the pipes. Don't do a thing to the grey tank.
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Old 05-03-2012, 10:54 PM   #3
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Without factoring in freezing temperatures, since spring is here. Is the RV going to get any use between camping trips or other travels? Like maybe the occasional overnight while it's parked by the house. If it's getting use between trips and the toilet is being used, leave a little water and a black tank chemical of some sort in the black tank. Toilet tissue and solid waste will harden in a dry tank and make if very difficult to flush later on. The water and chemical will help break down the solids and prevent them from hardening in your tank. We overnight in our MH next to the house from time to time, even in the winter of Northern Nevada. We use the toilet, but for #1 only. If we gotta do #2, we go inside the house. The tank has some chemical to help with deodorizing and a gallon or two of RV antifreeze so the urine doesn't freeze. RV antifreeze is relatively cheap for the protection if offers.

Kind of the same deal for the gray water tank. If you're rinsing stuff down the kitchen, or bathroom sink or shower drain that could harden or solidify you'll want some liquid in there to prevent that. If the RV is sitting un used while it's not being taken out, you don't need to leave anything in the tanks at all.

I'm sure others will chime in with good ideas as well. Like how to handle it when you did your black tank dump just before you're ready to pack out of your campsite and a family member goes and does #2 after the black tank is empty.

Gray tank is a lot more forgiving and you'd have to do something pretty crazy to mess that up. Black tank though is serious business in how it's cared for. Mess that one up and it will be very expensive getting it removed and taken care of. Not just for the cost of the RV repair shops labor, but for the disposable bio hazard ppe guys will need to wear when working on that tank.

Congrats on being a new RV owner! Enjoy it and best of luck!
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Old 05-05-2012, 06:58 AM   #4
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As far as the fresh water, I leave some water in it, but also use it some while it's in the driveway. If it's gonna sit for a month unused, drain all the fresh water.
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Old 05-05-2012, 09:53 AM   #5
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I keep 5 gals. with 4 oz. tank treatment in the black tank an another 5 in the gray.
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Old 05-05-2012, 09:59 AM   #6
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We utilize "the Geo Method". You can research it
Online. It utilizes water Softener, clothes soap, Clorox and water and has worked very well for us.
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