|
06-19-2016, 06:31 AM
|
#1
|
New Member
Join Date: Jun 2015
Location: Booneville
Posts: 5
M.O.C. #17558
|
Black Tank Odor
We have the 2016 3911 FB. It has the bath and a half. Our problem is with the half bath. Even when it was new within a couple of days after draining and flushing the odor coming from the tank when flushing will knock you down. I'm wondering if there is a ventilation problem. The unit has two gray tanks and two black tanks, but I don't know how the roof vents are configured to the tanks. We have no problem with the main bath toilet. The tanks are completely flushed using the tank flush, back flush through the outlet pipe and even occasionally using a spray wand inserted through the toilet. I always add plenty of fresh water to tank after flushing before use. I have even used the orange additive although it was never needed in any of our other rv's. Nothing works. Any suggestions would be appreciated.
|
|
|
06-19-2016, 08:17 AM
|
#2
|
Montana Fan
Join Date: Mar 2015
Location: Mountain Home
Posts: 148
M.O.C. #17188
|
We use lots of water to flush and a cap full of liquid calgon after each dump in our 2015 3910FB.
__________________
Andy and Nancy Parish
Marlee Claire and Magnolia Caroline
Pomeranian bosses AKA The MCfurries, Big white cat "G"
Mountain Home, Arkansas
|
|
|
06-19-2016, 09:44 AM
|
#3
|
Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,707
M.O.C. #7992
|
I had the same issue for the first time in eleven years,when I brought the unit out of winter storage. It was RANK. Took a hose up on the roof and inserted it in the black tank vent. Let it run for about 5 minutes at full force. Never felt a restriction as I lowered the hose down the pipe but after the flush the odor disappeared. Can only assume I flushed an obstruction out of the vent.
__________________
2006 3000RK
2009 Ram 2500
|
|
|
06-20-2016, 11:25 AM
|
#4
|
Montana Master
Join Date: Mar 2013
Location: Hanover
Posts: 1,471
M.O.C. #13325
|
X2 on the vent probably being obstructed. I wouldn't stick a hose with water down it until you've made certain it's even hooked up though. Some strange things happen at the factory on occasion.
__________________
|
|
|
06-20-2016, 11:35 AM
|
#5
|
Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
|
Sounds like the vent to me also.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
|
|
|
06-21-2016, 12:15 PM
|
#6
|
New Member
Join Date: Jun 2015
Location: Booneville
Posts: 5
M.O.C. #17558
|
I'm thinking ventilation is the most likely culprit also. I'm not sure how it can be checked out without taking a lot of stuff loose. With most products you can obtain a schematic to see how things are laid out, but not with a Rv. You can't even get an owners manual that is specific to your model, just a generic one that is usually very little help. I can always take it in to the dealer to be checked out, but I am trying to avoid this. We are full-timers with four little dogs and a cat and it is a major operation to leave it in the shop.
|
|
|
08-19-2016, 03:02 AM
|
#7
|
Montana Fan
Join Date: Mar 2015
Location: Mountain Home
Posts: 148
M.O.C. #17188
|
We use lots of water to flush and a cap full of liquid calgon after each dump.
__________________
Andy and Nancy Parish
Marlee Claire and Magnolia Caroline
Pomeranian bosses AKA The MCfurries, Big white cat "G"
Mountain Home, Arkansas
|
|
|
08-19-2016, 03:22 AM
|
#8
|
Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,171
M.O.C. #6433
|
I would expect there to be a sewer vent cap directly above the half bath. You might remove the cap and run a snake down the vent pipe first just to make sure it goes all the way down to the tank with no obstructions. You should get a little "stuff" on the end of the snake if it does. Then you could put a hose down it and flush it well as noted above.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
|
|
|
08-19-2016, 03:40 AM
|
#9
|
Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
|
We have a 2015 3910 with the same setup. Have not had a problem with the half bath. Agree with the recommendations above, if you have flushed the tank well, I would look at the vent.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
|
|
|
08-19-2016, 04:45 PM
|
#10
|
Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,953
M.O.C. #5651
|
A question for anyone - Are the vents on the roof those round plastic caps that are about 8 inches across? One of mine broke from too much sun and I replaced it, but don't know what they are for.
Thanks.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
|
|
|
08-19-2016, 06:04 PM
|
#11
|
Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,702
M.O.C. #12947
|
Those mushroom vents are attic vents. The sewer vents are smaller.
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
|
|
|
08-20-2016, 06:10 AM
|
#12
|
Montana Master
Join Date: Jul 2010
Location: Lake Havasu City AZ.
Posts: 1,811
M.O.C. #10552
|
8" across that's a vent for the living area. To vent the living area. I have 3 one in the potty area one in the hall by the shower and the fantastic fan for the rest of the rig.
__________________
Wayne and Ann Moore
2015 Ford F-350 King Ranch
Firestone air bags, bed saver.
Add 40 GAL tank in bed.
|
|
|
08-20-2016, 06:52 AM
|
#13
|
Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
|
Assuming you have the same cheap tank vents that came on mine, there is a screw beneath some silicone on the top of the vent. Remove and you can take it off. It should smell up there...if not...beware. the only way I know to easily id a vent to a tank is dump coolaid powder down the vent and see if the color comes out the other end. The one thing I know is that one bottle of 'awesome' into a tank with some water and then driven to the next campground, will clean the heck out of a tank. John
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Threads |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|