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Old 03-24-2016, 01:27 PM   #11
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Hello all,
I purchased a JayFlight two weeks ago but it will be June before taking it out. I only plan on filling the two tanks half way for most of our trips. With the tanks only filled half way am I still at risk for the siphoning effect?
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Old 03-24-2016, 01:50 PM   #12
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If you can extend your overflow hoses is the best solution from spillage during travel.
They have to be at least 6" higher than the Tank. Plugging those overflow hoses and by forgetting can rupture the tank during filling. Tanks are usual supported by 3 psc. 1 1/2" flat iron, I installed 1/2" ply under the tank for flat support and better draining.
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Old 03-24-2016, 02:56 PM   #13
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Hello all,
I purchased a JayFlight two weeks ago but it will be June before taking it out. I only plan on filling the two tanks half way for most of our trips. With the tanks only filled half way am I still at risk for the siphoning effect?
Here is the problem you might encounter (I'm not saying you will encounter it).
These tanks are long and wide and very shallow. Each tank is about 4 foot by 3 foot by about 6 inches or less. So if you fill half way, that means each tank will have about 3 inches or less of water in them. I'm not sure where your FW intake to your pump is, but on my 2012 model, it is located on the SIDE of the tank. You may start sucking air through your pump sooner than you think even though there may still be some water in your tanks. This is especially true if you trailer is not perfectly level, or you have some sagging of your tanks. You may run out of water long before you thought you might.
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Old 03-24-2016, 03:03 PM   #14
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We have a 28bhbe on order with the Elite package. Here's what I don't understand, what good does an 80 gal FW tank do when the grey tank is only 39 gallons? Most of the State/Federal parks around here have fresh water, but they don't always have a dump station. Wouldn't it be more beneficial to have 39 gals of fresh water and 80 gals of grey? How are people utilizing the extra 40 gals of fresh? Surely the black tank doesn't fill that quickly does it? Lol
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Old 03-24-2016, 03:32 PM   #15
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We have a 28bhbe on order with the Elite package. Here's what I don't understand, what good does an 80 gal FW tank do when the grey tank is only 39 gallons? Most of the State/Federal parks around here have fresh water, but they don't always have a dump station. Wouldn't it be more beneficial to have 39 gals of fresh water and 80 gals of grey? How are people utilizing the extra 40 gals of fresh? Surely the black tank doesn't fill that quickly does it? Lol
I agree with you. Ours has 84 gallon FW capacity and only 33 gallon BW and GW tanks. I wish I had more GW capacity. However, we usually do the following:

1. We use a dish pan in our sink and catch all the wash and rinse water. We empty this into the toilet (BW tank) when done doing dishes. Keeps water out of the GW tank and helps add water, soap and lubrication to the BW tank.

2. We also have a portable outdoor kitchen set up. We connect it to the outdoor shower hookup and often do dishes and hand washing out there. We drain it into a 5 gallon bucket. If we're in a campground, it gets emptied into the vault toilet.

3. We have a shower tent and often take our showers outside. Some campgrounds allow this, others do not. When boondocking, it isn't a problem. We use Dr. Bronner's biodegradable soap. That keeps a lot of water out of the GW tank.

4. And when we can't do either of the above, we just are very frugal with our showers and water use. The two of us can usually go about a week without filling up the GW tank.

We do LOVE having the 80 gallon FW capacity.
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Old 03-24-2016, 04:27 PM   #16
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Our 29RKS has two grey tanks, totaling around 70 gallons. That is one feature that attracted us to that model.
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Old 03-24-2016, 04:46 PM   #17
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Our 29RKS has two grey tanks, totaling around 70 gallons. That is one feature that attracted us to that model.
I'm on the opposite side of the spectrum. My new 38FDDS has 80 gallon fresh water capacity, but being hooked up to city water at my seasonal site, i suspect neither tank will ever see a drop other than when I perform seasonal sanitizing just to keep them clean. LOL!
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Old 03-24-2016, 06:20 PM   #18
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You may have to experiment to find out if you get siphoning with a half tank of fresh.
As stated the more capacity you have the less the effect except when full.
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