Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-14-2023, 01:42 PM   #1
2 Rivet Member
 
2018 33' Classic
Thousand Oaks , CA
Join Date: Jul 2020
Posts: 68
Black Tank Location

2018 33 Classic FB:


Looking for the black tank location. If I look under the black waste dump handle there is a panel with screws. I opened it up and can see the sensor strip but I don't know if it is for the black or grey tank.



If anyone can tell me it would be appreciated.
candrews768 is offline   Reply With Quote
Old 11-14-2023, 02:10 PM   #2
Rivet Master
 
dznf0g's Avatar
 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 13,636
Images: 5
The black tank is the one, usually, directly below the toilet...and usually the one closer to the rear axle. But not always. Depends on Floorplan.
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is online now   Reply With Quote
Old 11-15-2023, 07:27 AM   #3
3 Rivet Member
 
Oak Park , Illinois
Join Date: Mar 2023
Posts: 171
Quote:
Originally Posted by dznf0g View Post
The black tank is the one, usually, directly below the toilet...and usually the one closer to the rear axle. But not always. Depends on Floorplan.

Though this is typically the case, the 33' Classic and the 30' Bunk- (at least starting, the last few years), these two units have macerator toilets where the black tank is not directly under the toilet. My understanding is that this was done because the head is in the back and the back has somewhat limited tank capacity that far aft. For example, early 30' bunk models had a roughly 18 gallon black tank capacity with the bomb drop gravity type toilets. This similar layout was and may still be found in the 19' unit, that back in the early 2000s had a 9 gallon tank before it was increased to around 18 gallons. Given that the 30' bunks can sleep upward of 8 (approx), I think AS went to a macerator toilet so they could get more tank capacity by pumping it to a larger black tank closer to the axle.

The logic here seemed flawless- except that they also needed to increase the water tank size since those macerator toilets use a lot more water than the old gravity bomb toilets. In my mind it's a net zero gain, but it sounded like a nice idea. In practice I personally know the black tank fills faster as does the fresh water tank drain faster too compared to the gravity bomb droppers, but I digress......

To answer the question, if your 33' unit bears any resemblance to my 30' bunk with the macerator toilet, the black tank may be the tank just aft of the axles. Keep in mind that the OPs trailer is a 33' from 2018 and mine is a 2021 30' bunk. Not sure if 2018 started the macerator in the 33, but my guess is yes, given the premium amenities and place on the Airstream model food chain. I would guess the 33' had it first and then it trickled down as many things do from the Classic line.
sfranklin is offline   Reply With Quote
Old 11-15-2023, 07:29 AM   #4
Rivet Master
 
dznf0g's Avatar
 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 13,636
Images: 5
Quote:
Originally Posted by sfranklin View Post
Though this is typically the case, the 33' Classic and the 30' Bunk- (at least starting, the last few years), these two units have macerator toilets where the black tank is not directly under the toilet. My understanding is that this was done because the head is in the back and the back has somewhat limited tank capacity that far aft. For example, early 30' bunk models had a roughly 18 gallon black tank capacity with the bomb drop gravity type toilets. Given that particular coach can sleep upward of 8 (approx), I think AS went to a macerator toilet so they could get more tank capacity by pumping it to a larger black tank closer to the axle.

The logic here seemed flawless- except that they also needed to increase the water tank size since those macerator toilets use a lot more water than the old gravity bomb toilets. In my mind it's a net zero gain, but it sounded like a nice idea. In practice I personally feel the black tank fills faster as does the fresh water tank drain faster too compared to the gravity bomb droppers, but I digress......
Ah, I see. Does the location of the dump valve handles give you a clue? Any pics?
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is online now   Reply With Quote
Old 11-15-2023, 07:43 AM   #5
3 Rivet Member
 
Oak Park , Illinois
Join Date: Mar 2023
Posts: 171
Quote:
Originally Posted by dznf0g View Post
Ah, I see. Does the location of the dump valve handles give you a clue? Any pics?
Ironically, the closest to the tanks is the grey (on the left) and the furthest dump valve from the tanks is the black (on the right)- if Airstream is consistent. Because the black tank contents are ground up due to the macerator toilet, with the right pitch, they can get greater distances from the dump valves compared to the gravity bomb toilets that had far more solids where the gravity trick wouldn't work (assuming in both cases the trailer was reasonably level on all angles.

My understanding of the tanks around and above the axles in these particular units looks something like this:

Front of coach---> grey tank-->axles-->fresh tank (over the axles)-->black tank- just aft of the rear axle.

If someone knows otherwise, I'd love to hear it so I know for certain, but sans that, this seems correct by my digging around my coach.
sfranklin is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
New Black Tank thinking about adding a black tank flush Peter417 Waste Systems, Tanks & Totes 1 12-21-2020 11:18 AM
Rust? What rust?? Black tank? What black tank??!? gadgetgeek Repairing/Replacing Floor &/or Frame 2 08-08-2018 11:20 AM
Black Tank, Grey Tank, New Tank, Old Tank Bunkroom Waste Systems, Tanks & Totes 3 07-22-2014 09:35 PM
location location location goransons Airstreams on eBay 0 12-05-2009 10:29 AM
Location, Location, Location........... ROBERTSUNRUS Brakes & Brake Controllers 5 08-29-2009 07:13 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 08:17 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.