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Old 10-10-2014, 08:28 PM   #1
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21' fresh really 30 gal?

Does anyone know if the 21' really has a 30-gallon fresh tank (with a 30-gallon gray tank)?
Not the situation with the 19' with room for the six gallons from the water heater.
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Old 10-10-2014, 09:02 PM   #2
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Quote:
Originally Posted by Floating Cloud View Post
Does anyone know if the 21' really has a 30-gallon fresh tank (with a 30-gallon gray tank)?
Not the situation with the 19' with room for the six gallons from the water heater.
Yes. Fresh, gray and black are 30, 30, 22, respectively. The 19 is 20, 26, 19.
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Old 10-10-2014, 10:00 PM   #3
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Does anyone know why they did that instead of their normal way?
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Old 10-10-2014, 10:27 PM   #4
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Does anyone know why they did that instead of their normal way?
What is the "normal way"?
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Old 10-10-2014, 10:44 PM   #5
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If I understand my orientation correctly IF the shower drain on the 19 is not tight and the gray tank is too full, you will have back flow into the shower. So the tank size in gallons is a 'guide'to capacity but isn't as critical as the fluid level.

On our Scamp there was a pump which serves as a back flow preventer near the shower drain.

When I visually inspected under the 19' it looked to me like back flow into the shower could happen especially if you were driving and the gray water sloshed to the shower side. I keep the shower drain tightly closed!
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Old 10-10-2014, 11:14 PM   #6
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Just FYI, I checked with ETI and the "gallons" are US-sized gallons, not Imperial gallons........
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Old 10-11-2014, 12:02 AM   #7
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If I understand my orientation correctly IF the shower drain on the 19 is not tight and the gray tank is too full, you will have back flow into the shower...
When I visually inspected under the 19' it looked to me like back flow into the shower could happen especially if you were driving and the gray water sloshed to the shower side.
I think that's pretty common. RV grey waste tanks are normally directly against the underside of the trailer floor, and the shower floor is immediately on top of the trailer floor. My motorhome has the shower floor on a riser, but it has the ceiling height to do this - my Boler trailer does not, and any overflow or sloshing will back up into the shower.

Quote:
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On our Scamp there was a pump which serves as a back flow preventer near the shower drain.
I wouldn't call the Scamp pump a back flow preventer - I believe it's needed to get the water from the shower to go to the gray tank at all. I think it's good to avoid that extra pump if practical.
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Old 10-11-2014, 11:35 AM   #8
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Quote:
Originally Posted by Klem View Post
If I understand my orientation correctly IF the shower drain on the 19 is not tight and the gray tank is too full, you will have back flow into the shower. So the tank size in gallons is a 'guide'to capacity but isn't as critical as the fluid level.

On our Scamp there was a pump which serves as a back flow preventer near the shower drain.

When I visually inspected under the 19' it looked to me like back flow into the shower could happen especially if you were driving and the gray water sloshed to the shower side. I keep the shower drain tightly closed!
We actually had the reverse problem. We had the trap from the shower empty into the gray tank when traveling on rough roads. When we stopped there was a fowl odor in the bathroom. A cup of water into the shower drain fixed that. I believe that Escape has changed the trap design since ours was built. Never did we have gray water come back into the shower nor did we use a stopper in that drain. We rarely traveled with the gray tank full but usually there was something in the tank.

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Old 10-11-2014, 11:44 AM   #9
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I don't really know what the op is referring to.

Is the suggestion that the 21's 30 gallon fresh water tank actually has a 24 gallon capacity, and the 6 gallon h/w heater tank contains the balance? Ditto for the 19' - 13 gallon fresh capacity plus 6 gallon h/w tank?
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Old 10-11-2014, 03:26 PM   #10
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I don't really know what the op is referring to.

Is the suggestion that the 21's 30 gallon fresh water tank actually has a 24 gallon capacity, and the 6 gallon h/w heater tank contains the balance?
The water heater volume is literally not part of the fresh water tank, and it also doesn't count toward the trailer's total fresh water carrying capacity. It is necessary to carry water in the heater (if you want hot water), but you can never use it as an extra six gallons because the heater must remain full to be used, and because there is no way for the pump to push this water out to the rest of the trailer.
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