RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 08-13-2017, 06:39 PM   #1
Senior Member
 
Winnebago Owners Club
Join Date: Aug 2017
Location: Middle Arizona
Posts: 274
Black and Grey Tanks Open ? Closed?

New to a Class A gas with a gravity feed for grey and black tanks. My B+ had a macerator pump so when you dumped, you knew what was going on, as you had to do it.
I have had the impression that TT and A's and C's that have their hookups at campgrounds leave them open, so stuff drains as it happens.
Recently I read, it is not a good idea to leave the tanks open.

So which is it? what do you do? How does it work? Any recommendations?

Starting the learning curve over again after 8 years with one rig. Oh well!
Thanks in advance for any inputs.
__________________

__________________
Turn the Key and Smile
2015 Winnebago Vista 31KE
Tuned, Swayed, Sumo'd
zekethomas is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-13-2017, 06:42 PM   #2
Senior Member
 
fpresto's Avatar
 
Join Date: Mar 2017
Location: MD
Posts: 247
I keep both closed until I need to dump. Some keep the gray open. Never leave the black open. You will get a pyramid of poop that causes all kind of issues.
__________________

__________________
Fulton and Donna USN Ret (both)
Maryland
2016 Tiffin 32 SA, 2013 Smart Toad
fpresto is offline   Reply With Quote
Old 08-13-2017, 06:42 PM   #3
Community Administrator
 
Spk64's Avatar


 
Newmar Owners Club
Join Date: Apr 2014
Location: Southern Indiana
Posts: 12,597
Black and Grey Tanks Open ? Closed?

Leave the black closed till it is ready to dump.
Grey is optional but nice to have grey to help rinse after dumping black.

I typically leave both closed until needing to dump.
Only exception is if laundry is being done then grey is left open.
__________________
Steve
2002 Newmar Mountain Aire 4095

Wash your Hands, Wear a Mask, Social Distance
Spk64 is online now   Reply With Quote
Old 08-13-2017, 06:42 PM   #4
Senior Member
 
Winnebago Owners Club
Join Date: Aug 2017
Location: Middle Arizona
Posts: 274
Open or Closed?

Having spent 8 years with a B+ that had a macerator, I have been under the impression that gravity fed black and grey drains are left open when at a full hoop up site and drain as activity happens. But also just read a post that said that was not a good idea.

Just bought a Class A gas with gravity feed drains. So, do you leave the valves open or closed? What works best for you and why?

What should I know that I dont?

Appreciate the information ... learning all over again.
__________________
Turn the Key and Smile
2015 Winnebago Vista 31KE
Tuned, Swayed, Sumo'd
zekethomas is offline   Reply With Quote
Old 08-13-2017, 06:45 PM   #5
Senior Member
 
vsheetz's Avatar


 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 14,809
Closed until ready to dump. Especially black to avoid water drain away and leaving solids to solidify. Some will leave grey open because if dishwasher and laundry creating lits of water. I do not as often there is no trap in the CG sewer connections so odors, bugs, etc. may come up your hose.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
vsheetz is offline   Reply With Quote
Old 08-13-2017, 06:46 PM   #6
Senior Member
 
Join Date: Sep 2016
Posts: 620
Leave the black tank closed until it's at least 2/3 full. It needs water in it or you'll end up with dried sewer pickles in the bottom.
Some people leave the gray water valve open but I like to use that water to flush the hose after draining the black tank.
AITG is offline   Reply With Quote
Old 08-13-2017, 06:50 PM   #7
Senior Member
 
Join Date: Sep 2012
Posts: 8,055
Black closed except when dumping. Gray could be either way but probably better off closed.

The issue is RV plumbing does not have the slopes that house plumbing has to carry away the solid waste with the reduced flush water. The result is a more or less solid mass of solids building up in the black tank. Leaving the valve shut lets the water keep everything soupy. Using extra water also helps. Don't be stingy with flush water.

The gray tank is used to flush the hose after a black dump. If you start with it closed and get a feel for what it takes to fill it you might find you can do an extra dump or leave it open for a day or two. You are also playing with a smaller version of the dreaded pyramid of poo but with food particles. Getting the tank more than half full before a dump helps that. The exceptions is if you have a clothes washer. Leave it open when washing clothes.
nothermark is offline   Reply With Quote
Old 08-13-2017, 06:51 PM   #8
Senior Member
 
Pa Miller's Avatar
 
Monaco Owners Club
Vintage RV Owners Club
Join Date: Feb 2015
Location: East Texas
Posts: 716
Both closed .
__________________
1995 Monaco Dynasty
32' B5.9 Banks, 6 speed Alison 3060
2008 HHR Panel toad
Safe-T-Plus
Pa Miller is offline   Reply With Quote
Old 08-13-2017, 06:55 PM   #9
Senior Member
 
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 4,006
Stop and think about it. Do you think that when the toilet is flushed, the solids will flow over a flat horizontal surface to the opposite side where is can exit the tank? Probably not. And as soon and the second and third flush solids get stopped by the first flush that may have dried, you have the makings of a real big problem that you will not enjoy correcting. For that reason, it is advised to start with 5 gallons of water in the black tank and keep the valve closed so that as solids accumulate in the tank, thay remain in suspension or at least not sticking to the bottom. Then when the tank is at least 2/3 full, you open the valve and all of the solids will flow out with the liquid. Then if you also kept the grey tank closed, you can flush the black water out of the hose with the grey water. This process keeps solids from building up in the black tank.
__________________
2013 43 QGP Allegro Bus
2013 Avalanche
CJ7 Rock Crawler
Crasher is online now   Reply With Quote
Old 08-13-2017, 07:09 PM   #10
Senior Member
 
Wundertaker's Avatar
 
Join Date: Jul 2016
Posts: 2,009
I have 3 tanks....all stay closed until at least 2/3 to full. I drain black first, galley second, bath and shower last. I will start using geo method for black tank next trip
__________________
Mike, Betty & Sophie (Guard Cat)
Full Timers from the Great Lakes State of Michigan
2013 Silverado 3500HD Duramax Diesel & 2013 Cedar Creek Silverback

Wundertaker is offline   Reply With Quote
Old 08-14-2017, 12:21 AM   #11
Senior Member
 
JFXG's Avatar
 
Newmar Owners Club
Freightliner Owners Club
Join Date: May 2012
Location: Today? Granger, Texas
Posts: 4,361
Zeke, first of all, Welcome! You've come to the right place. Many happy miles!

There is only one hard protocol vis a vis tanks, and that is black closed and plenty of water.

Gray tank can stay open or closed, your choice. As many have stated, a gray quantity can be useful. If you drain it after you've drained your black, it will serve to rinse the residual black water out of your hose line.
But it may not be convenient. These systems are generally designed such that the gray and black quantities together approximately equal your fresh tank. We have 45 gal black and 65 gal gray, yet we find that it is the gray tank that is our limiting factor. The gray fills considerably quicker than the black, and I find myself going out too often to drain things. For that reason I leave our gray open until I estimate a day or two until black full, then close the gray. This gives me enough retained gray to rinse the hose line.
Good Luck with your A, and again, Welcome!
__________________
John & Diane, Fulltimers. RVM103 NHSO
On the road since June '12 with Lincoln, the guard cat.
2002 Dutch Star 40, Freightliner, Cat 3126, 2004 Element
JFXG is offline   Reply With Quote
Old 08-14-2017, 03:39 AM   #12
Registered User
 
Join Date: Aug 2016
Posts: 3,401
All closed until dump.
marjoa is offline   Reply With Quote
Old 08-14-2017, 04:26 AM   #13
Senior Member
 
Monaco Owners Club
Holiday Rambler Owners Club
Join Date: Oct 2012
Location: Carpentersville, IL
Posts: 232
Open or Closed

I've always left the black tank drain closed until it reaches about 2/3rd's full and left the grey tank closed until it reaches about the same.
Reason being that when draining the black tank, you need the water from the grey tank to clean out the hose - otherwise you'll end up with "stuff" you don't want plugging up the hose. - Drain the black first - when done open the grey valve to clear out everything.
__________________
Steve & Maryann Nowak
'98 Holiday Rambler Imperial 38WDS
'16 Subaru Outback LTD, '07 Infiniti G Cpe
FMCA # F26083
fluffyms is offline   Reply With Quote
Old 08-14-2017, 04:43 AM   #14
Senior Member
 
Sweetbriar's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Join Date: Jul 2011
Posts: 3,024
All closed. Half the time I don't even break out the slinky until the morning of departure for stays less than a few days.
__________________

__________________
2006 Hurricane 31D built on a 2006 Ford F53
Sweetbriar is offline   Reply With Quote
Reply

Tags
grey tank, tank



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
Tanks Open or Closed clifford j 5th Wheel Discussion 15 10-25-2016 01:11 AM
To keep holding tanks closed or open Climbon69 Class A Motorhome Discussions 53 01-08-2015 01:01 AM
Black and Gray Tanks - Open or Closed??? RipRiver iRV2.com General Discussion 24 09-02-2013 08:26 AM
Grey Tank: Leave open or closed ? michguy RV Systems & Appliances 10 07-23-2011 07:05 AM
Cleaning the grey water and black water tanks the57man Winnebago Industries Owner's Forum 6 08-18-2009 07:23 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 07:49 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×