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Old 01-19-2021, 10:44 PM   #1
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5th wheel grey tank sizes

We just picked up our new Rockwood 5er Signature late last week. Our last camper ( a travel trailer) had 2 grey tanks split up 60/ 40. So how does Rockwood split up these tanks in size? I have 2 grey tanks and Rockwood list grey tank 90 gallons. What tank is the bigger one or are they the same split 45 / 45. One is for the kitchen sink and the other the bath sink and shower. I just have no idea how they size them out. No documentation to tell me. I'm guessing it may be 60 gallons shower bath and 30 for the kitchen. I sent the question to Rockwood , but no reply from them. Does anybody know what it would be for the 2021 signature class?
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Old 01-22-2021, 01:40 PM   #2
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UPDATE to this question. I did get a response from Rockwood today.
Not sure it was the correct answer though. The lady said my unit has two 50 gallon tanks. Making things 100 gallons grey. Funny , but I can find nowhere that it says 100 gallons grey. All I have found says 90 gallons. Not sure what to make from this answer.
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Old 01-24-2021, 08:42 AM   #3
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My 2021 Rockwood (different model) is 45/45. Does your build sheet show tank sizes?
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Old 01-24-2021, 12:22 PM   #4
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Originally Posted by mac1_131 View Post
My 2021 Rockwood (different model) is 45/45. Does your build sheet show tank sizes?
No it does not show them. You'd think it would. I've gone back and asked the lady at Rockwood to reconfirm what she told me as it didn't make sense. Her reply was that some changes are made to the units with out the publications being updated as quickly. I did notice that the on line brochure has been updated some. It still only says 90 gallon grey though.
For now I have to assume she is correct and it has two 50 gallons tanks.
Which is a good thing.
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Old 01-26-2021, 06:08 PM   #5
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OK so now i have no idea what size my grey tanks are. Today I get an e-mail from a factory rep and they tell me I have 80 gallons with a split on both tanks of 40 gallons each. I mean what the heck ? Does Rockwood even have a clue what they build ? Its a simple question on a product they supposedly designed and built. How the heck can they not know? If there is a Forrest River/ Rockwood rep on here can you answer this very simple question with the correct answer?
Such a well built unit ,but no idea what they put in it. Its freaking sad.
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Old 01-26-2021, 06:14 PM   #6
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So buy one of these, fill the applicable drain with a hose and then you can tell them your actual capacity https://www.amazon.com/Orbit-56854-H...49413728&psc=1
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Old 01-26-2021, 09:36 PM   #7
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So buy one of these, fill the applicable drain with a hose and then you can tell them your actual capacity https://www.amazon.com/Orbit-56854-H...49413728&psc=1
Yeah I get it, its still freaking sad they don't know what they did .

I have meter sort of like that already it will be a pain , but at least I don't have a water bill to pay. What a waste that would have been. Having to do it at all is not cool.
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Old 01-26-2021, 09:52 PM   #8
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Originally Posted by Rolling Chaos View Post
Yeah I get it, its still freaking sad they don't know what they did .

I have meter sort of like that already it will be a pain , but at least I don't have a water bill to pay. What a waste that would have been. Having to do it at all is not cool.
Well, at least you know you have somewhere between 80 and 100 gallons of grey tank I believe most RVs with multiple tanks use the same size tanks, at least the ones I'm familiar with. Sounds like your old one may have been an exception?
You can look at it another way also. If this is your biggest problem with a new RV, you are lucky
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Old 02-01-2021, 06:10 PM   #9
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Originally Posted by NMWildcat View Post
Well, at least you know you have somewhere between 80 and 100 gallons of grey tank I believe most RVs with multiple tanks use the same size tanks, at least the ones I'm familiar with. Sounds like your old one may have been an exception?
You can look at it another way also. If this is your biggest problem with a new RV, you are lucky
Yeah your right. Would have been nice to know and I will once I get the meter I ordered.
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Old 02-01-2021, 06:59 PM   #10
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That’s a good amount of grey water, what size black tank and fresh tank?
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Old 02-01-2021, 07:08 PM   #11
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Quote:
Originally Posted by Rolling Chaos View Post
If there is a Forrest River/ Rockwood rep on here can you answer this very simple question with the correct answer?
Such a well built unit ,but no idea what they put in it. Its freaking sad.
There has never been any Rockwood/Flagstaff employee here, as a member.
Currently the only FR employees that are Forum members, are all from Brian Clemens Motorhome divisions.
I don't know of any from the Towable divisions that are active here, at least over the last year or two. A while back, there were 3 or 4 that were members but they haven't been active for a long time. They probably don't work for FR anymore.
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Old 02-01-2021, 09:04 PM   #12
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That’s a good amount of grey water, what size black tank and fresh tank?
Funny you should ask. As of last check the web site says 54 fresh water tank and 50 black tank. So the fresh has gone down from what was posted. It used to say 60 fresh water. Maybe it's just me. I have never seen tank sizes change so much as they have on this line. I started looking at them a year ago. At that time it was posted as 60 gallon fresh tank 80 grey and 40 black. I can't find anyone at Rockwood who really knows the sizes. Like I said I'll know for sure when I get the meter I ordered.
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