Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-31-2003, 06:54 PM   #29
2 Rivet Member
 
gerbermania's Avatar
 
Join Date: Oct 2002
Posts: 63
Images: 7
59toaster:
Thanks for the compliment. I find that graphics like these are the best way for me to work challenges out. I like solving challenges before they become issues. As far as dumping the grey into the black, I have added a dump valve in my system which does just that, see the attached image. In the pipe going from the grey to the black tank, there is a a swing check valve to prevent backflushing of black into grey, then a "T" for the greywater bypass, then a dumpvalve. The dumpvalve can only be used, however, if the black tank is 1/2 full or less, otherwise the tanks level each other out. Best case scenario, I dump excess greywater into the black tank, effectively increasing the size of the grey tank. If I were the lead designer at AIRSTREAM, I would still design at least two tanks, black and grey, I would not combine them. It is a waste of water, to use potable water to flush the black tank. By using the greywater from other larger tanks after dumping the black tank, potable water is conserved. That being said, I would *LOVE* a 50 gallon grey tank, and a 50 gallon freshwater. As it is, I have a 17 gallon black, 17 gallon grey that I added, and a 25 gallon freshwater. The grey tank cost me $400 from www.all-rite.com, otherwise I'd add an additional one under the floor for freshwater. I've squandered enough of my son's college fund.

rluhr:
Too funny, who's chekcing your math? The attached image should explain a bit more. The tank varies in depth from 7" to 4". Those were exterior dimensions, and the tank is roto-molded, so the sidewalls are approximately 3/8" thick. If you like math, cool, I prefer the tank calculator at: http://www.watertanks.com/calc.asp

markdoane:
Good points. Like you said, the Jabsco is self-priming, so I expect it to act more like a vacuum when it starts to create foam. It is mounted horizontally straight out from the tank outlet, which is the lowest point of the tank, so it should suck out most everything. I built a connection to flush my greywater through the black tank, once the black is emptied. That should clean it up pretty well.

As far as my renderings, I typically 3Dmodel in AutoCAD and Rhino, and render images with Penguin and AccuRender. I do most page layouts and presentations with PowerPoint, and edit my images in PicturePublisher. These are tools I use daily as an architectural designer.

Christopher
Attached Thumbnails
Click image for larger version

Name:	penguin-tanks1.jpg
Views:	266
Size:	34.4 KB
ID:	3635  
__________________

__________________
gerbermania is offline   Reply With Quote
Old 03-06-2006, 11:20 PM   #30
4 Rivet Member
 
ankornuta's Avatar
 
Currently Looking...
Lowell , Massachusetts
Join Date: Oct 2005
Posts: 435
Images: 22
So... a few years later.. Uwe, did the vent work?
__________________

__________________
ankornuta is offline   Reply With Quote
Old 03-06-2006, 11:36 PM   #31
uwe
418
 
uwe's Avatar
 
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,767
Images: 41
Send a message via Skype™ to uwe
Quote:
Originally Posted by ankornuta
So... a few years later.. Uwe, did the vent work?
Andrew,

Yes, it worked like a charm. Even though the sink drain connected to the side of the tank at about the middle, the tank filled up nicely after the mod was done. I had 2/3 more capacity.
__________________
Uwe
www.area63productions.com
uwe is offline   Reply With Quote
Old 03-07-2006, 11:53 AM   #32
4 Rivet Member
 
ankornuta's Avatar
 
Currently Looking...
Lowell , Massachusetts
Join Date: Oct 2005
Posts: 435
Images: 22
The people at the RV parts store (not necessarily experts, I know) told me that all the drains had to come into the top of the gray tank. That didn't seem logical to me, so long as the drain opening (i.e. sink, shower) is above the highest point of the tank. It sounds like you're not running your drains into the top, you mentioned it connects into the side of the tank. So anyhow, this hasn't posed any problems?
__________________
ankornuta is offline   Reply With Quote
Old 03-08-2006, 07:07 AM   #33
uwe
418
 
uwe's Avatar
 
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,767
Images: 41
Send a message via Skype™ to uwe
Quote:
Originally Posted by ankornuta
The people at the RV parts store (not necessarily experts, I know) told me that all the drains had to come into the top of the gray tank. That didn't seem logical to me, so long as the drain opening (i.e. sink, shower) is above the highest point of the tank. It sounds like you're not running your drains into the top, you mentioned it connects into the side of the tank. So anyhow, this hasn't posed any problems?
As long as there is a vent in the top of the tank, it will fill completely, regardless of where the inlet is.
My sink inlet was in the side of the tank, 1/3 of the way down, the shower inlet was through a T in the bottom outlet.
It was a problem before Isintslled the vent. The tank would only fill to the level of the sink inlet. After vent installation, it filled pretty much completely, to the point where it would back up in the shower pan. I did not have atnk sensor on this add-on tank, so every once in a while the tank would get too full.
__________________
Uwe
www.area63productions.com
uwe is offline   Reply With Quote
Old 03-08-2006, 08:50 PM   #34
4 Rivet Member
 
ankornuta's Avatar
 
Currently Looking...
Lowell , Massachusetts
Join Date: Oct 2005
Posts: 435
Images: 22
Ahhh... that makes sense to me. Thanks for your continued support!
__________________

__________________
ankornuta 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
That pesky grey water that bypases the holding tank Van All Argosy Trailers 15 08-13-2004 08:52 AM
Why not grey water into black tank? pilgrim_still Waste Systems, Tanks & Totes 40 10-08-2003 08:59 PM
poor-man's grey tank Chuck Waste Systems, Tanks & Totes 9 09-05-2003 11:59 AM
No grey tank, no sewer hookup Safari Tim Our Community 8 07-11-2003 08:36 PM
No Grey Water Tank????? Anna Waste Systems, Tanks & Totes 16 11-17-2002 08:33 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:47 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.