Good Sam Club Open Roads Forum: Fifth-Wheels: Holding tanks
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Fifth-Wheels

Open Roads Forum  >  Fifth-Wheels

 > Holding tanks

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next
RandandDoug

East Texas

Full Member

Joined: 01/09/2009

View Profile



Good Sam RV Club Member


Posted: 04/10/21 12:54pm Link  |  Quote  |  Print  |  Notify Moderator

Bought a used 2019 Keystone Avalanche 321RS.
All company specs I have seen show it having 1 black and 1 grey tank.
There are two grey Pulls and one black. The salesman and I did a fairly quick walkthrough, my 3rd rv, and he explained that there are 2 grey tanks, and the that was that.
I am out today familiarizing myself with the trailer, flushing tanks and stuff, and it seems as though the bathroom sink is plumbed into the black tank, not sure about the shower yet, will be going back out to run some water through that too.
Is anyone here familiar with that? Seems strange to me, but I can live with it. Just curious and all the places to call are of course closed for the weekend.
Thanks

work2much

On the Road

Senior Member

Joined: 12/30/2006

View Profile


Offline
Posted: 04/10/21 01:07pm Link  |  Quote  |  Print  |  Notify Moderator

Pretty common for 5th wheels to have 2 grey tanks. One for the bath and one for the galley.


2017 Ram 3500 Laramie CTD DRW Crew 4x4 Aisin 4:10 Air ride.

2020 Grand Design Solitude 2930RL 2400 watts solar. 600ah lithium. Magnum 4000 watt inverter.

ssthrd

Vancouver Island

Senior Member

Joined: 03/23/2016

View Profile



Posted: 04/10/21 01:42pm Link  |  Quote  |  Print  |  Notify Moderator

On my 2014 Laredo, there is a black (Right side) and a grey tank (Left side) between the frame rails directly under the toilet and the sink/shower. (Just repaired the grey [emoticon] ).

There is another grey under the galley sink.......... Not sure about the fresh water tank, but I assume it is beside the grey and on the left side.

The front tanks look to be the same size...........

Hope this helps. Good luck getting info from Keystone.


2014 Laredo 292RL
2018 GMC 3500HD 6.5' box SRW Denali Duramax Anderson
DeeBee, JayBee, and Jed the Black Lab


agesilaus

North Florida

Senior Member

Joined: 05/06/2008

View Profile



Good Sam RV Club Member

Online
Posted: 04/10/21 02:01pm Link  |  Quote  |  Print  |  Notify Moderator

Dump some dye and water down the drains one at a time and see which valve shows the color


Arctic Fox 25Y Travel Trailer
2012 Ford F-350 4WD Lariat 6.7L
Straightline dual cam hitch
400W Solar with Victron controller
Superbumper


wildtoad

Blythewood, SC

Senior Member

Joined: 06/05/2011

View Profile



Good Sam RV Club Member


Posted: 04/10/21 02:35pm Link  |  Quote  |  Print  |  Notify Moderator

Not uncommon for bathroom sink being plumbed to the black tank either due to ease of plumbing or to help assure sufficient water in the black to assure sufficient water to have things flow properly.


Tom Wilds
Blythewood, SC
2016 Newmar Baystar Sport 3004
2015 Jeep Wrangler 2dr HT

TXiceman

Full Time RVer

Senior Member

Joined: 11/17/2000

View Profile





Offline
Posted: 04/10/21 02:35pm Link  |  Quote  |  Print  |  Notify Moderator

work2much wrote:

Pretty common for 5th wheels to have 2 grey tanks. One for the bath and one for the galley.


Not all common to have two gray tanks, but some do. It is usually when the kitchen sink and shower are on opposite ends. The bathroom sink may be routed to the black tank since it is generally low use and the black needs lots of water to operate properly.

Ken


Amateur Radio Operator.
2013 HitchHiker 38RLRSB Champagne, toted with a 2012, F350, 6.7L PSD, Crewcab, dually. 3.73 axle, Full Time RVer.
Travel with a standard schnauzer and a Timneh African Gray parrot

ssthrd

Vancouver Island

Senior Member

Joined: 03/23/2016

View Profile



Posted: 04/10/21 04:40pm Link  |  Quote  |  Print  |  Notify Moderator

agesilaus wrote:

Dump some dye and water down the drains one at a time and see which valve shows the color


Good idea. Two different colors of food dye.

I forgot to say that both the shower and the bathroom sink go into the grey tank.

RandandDoug

East Texas

Full Member

Joined: 01/09/2009

View Profile



Good Sam RV Club Member


Posted: 04/10/21 04:57pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the responses. The labels at the pulls were wrong. Not sure why or how, but now I know so no problem. Not sure if it came like that or might have had some work done on it. And it does have two greys, but all the generic manuals and things online say one. I will be under it tomorrow, so maybe I will get some more surprises, but that's what's fun about this stuff, sometimes!! Haha

Roger10378

Goodrich, MI.

Senior Member

Joined: 05/29/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 04/10/21 05:13pm Link  |  Quote  |  Print  |  Notify Moderator

When the bathroom and galley are on different levels they will have separate gray tanks. If they didn't it would be easy to overfill the tank and it would leak out of the one on the lower level while you didn't realize it and keep using the one in the upper level.


2005 Cardinal 30TS
2007 Chevy 2500HD D/A

RickLight

Washington

Senior Member

Joined: 01/22/2017

View Profile



Good Sam RV Club Member

Offline
Posted: 04/10/21 09:30pm Link  |  Quote  |  Print  |  Notify Moderator

I think it's not so much different levels as the distance between drains.

The general rule is 1/4" drop per 12" run. If the drains are too far apart then they can't connect to the same outlet. Mine are about 20' apart, so 5" drop!


Rick,

2019 Grand Design Reflection 150 273MK
2015 Ford F350 CC SB Lariat Powerstroke
PullRite Superglide

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next

Open Roads Forum  >  Fifth-Wheels

 > Holding tanks
Search:   Advanced Search

Search only in Fifth-Wheels


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.