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06-19-2018, 07:50 AM
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#41
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Montana Master
Join Date: Jan 2005
Location: North Ridgeville
Posts: 20,229
M.O.C. #2839
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I do not know what we are doing but we have never since 2006 and two Montana's had a black tank or galley tank odor problem/ We do use a lot of water and dump often.We are in warm to hot climates all year.Perhaps lots of water and dump often is the answer.?
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06-19-2018, 09:00 AM
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#42
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Montana Fan
Join Date: Mar 2016
Location: Sedona
Posts: 176
M.O.C. #18355
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When I dump, I first pull the black tank valve and let it drain as much as it will. Then pull the two grey tank valves. The grey water flows to the black tank and helps to rinse it out.
Then when the flow slows/stops, turn on the rinse. When it runs clear, turn everything off and close all valves. Calgon and cheap laundry detergent added after tank is empty. Five years in the rig about 5-6 months each and no problems or odors so far.
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06-19-2018, 09:54 AM
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#43
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Montana Master
Join Date: Jul 2010
Location: Lake Havasu City AZ.
Posts: 1,811
M.O.C. #10552
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Mark7, your rig may sit lower to the ground than others. But the rigs with hydraulic levelers must sit higher. If I were to put a bottom drain on my tanks the effluent piping would still be 6 to 8 inches above the front landing ram foot and the same for the mid ram. I have installed a 6 inch PVC pipe just behind the landing gear ram. It's for storage of the sewer hose and it is below the drop frame but still well above the ground. Any elbow installed on the bottom of a tank would be at least 10 to 14 inches above the bottom of the storage pipe.
As for water, I am not concerned with that I am concerned with solids not being able to flow out over that lip.
Just saying is all.
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06-21-2018, 11:04 AM
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#44
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Montana Fan
Join Date: Jun 2012
Location: somerville
Posts: 135
M.O.C. #12636
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Had similar odor problem, found indoor sewer vents, kitchen and bath sinks, to be the problem(sticking open?). Solution replace with better quality units or do as I did(at the suggestion of my trusted repairman)block them off all together, sinks will still vent. Had no problems with draining or more important no more odor problems.
You will still get odors if you have roof vents open and the wind is coming in the right direction.
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06-29-2018, 04:06 AM
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#45
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Montana Master
Join Date: Jan 2018
Location: Northville, NY
Posts: 807
M.O.C. #21158
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I agree with Beau2010 only I run the rinse before dumping the grey. Either way will work and like Richfaa I use lots of water when flushing. Six years in two rigs at 6 months a year and never an odor problem.
__________________
Jim B
2017 Lariat F-350 FX4, CC, SB, 6.7 PSD 4WD
2018 MONTY 3731FL, at our private winter site in GA
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06-16-2019, 12:26 PM
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#46
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Established Member
Join Date: May 2019
Location: Reno
Posts: 42
M.O.C. #23970
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Water pressure concern
We have a 3701LK and was concerned about the water pressure when we use the black tank flush. Should I still use our water pressure limiter when I flush the black tank in the convenience center? Or just run full pressure?
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06-16-2019, 12:30 PM
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#47
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,952
M.O.C. #20477
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Quote:
Originally Posted by Track50
We have a 3701LK and was concerned about the water pressure when we use the black tank flush. Should I still use our water pressure limiter when I flush the black tank in the convenience center? Or just run full pressure?
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Recommend using a pressure regulator.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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06-16-2019, 01:10 PM
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#48
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Established Member
Join Date: May 2019
Location: Reno
Posts: 42
M.O.C. #23970
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Thank you. That's what I thought. Better be safe than sorry!
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06-16-2019, 02:13 PM
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#49
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Montana Master
Join Date: Aug 2015
Location: SWFL
Posts: 964
M.O.C. #17801
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Full pressure = better cleaning action.
__________________
2016 Montana 3711FL
2005 Ford F350, 6.0 diesel, short bed
Demco Hitchiker Auto Slide hitch
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06-16-2019, 02:29 PM
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#50
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Established Member
Join Date: Mar 2016
Location: Lodi
Posts: 10
M.O.C. #18345
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Black tank flush
I've replaced two black tanks due to my own negligence. "ALWAYS" have the drain valve open when flushing the tank. "DO NOT" think you can fill the tank and get a better flush. When filling the tank, the process will build up the air pressure ( I know, it shouldn't), and the air pressure will split the tank. Not a cheap fix if your warranty has run out. Even under warranty, the co-pay will not be fun. The warranty does not cover the shipping.
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06-16-2019, 02:37 PM
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#51
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Established Member
Join Date: Mar 2016
Location: Lodi
Posts: 10
M.O.C. #18345
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Black and Gray tank flush
You may notice that the flush valve is at the top front of the tank. The reason for this is that the bottom of the tank is sloped to the drain. I'm sure the thinking is that the liquid will flow down and clean out the tank. One small thing is over looked. The sensors or at the other end of the tank than the flush sprayer. The sprayer will not clean the sensors.
The next time I find it necessary to open up the tank area, I plan on installing an additional flush sprayer in the sensor area. Hope that that will clean the sensors. The sprayers are available on Amazon and are around $20. Sorry, just checked, $30.
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06-17-2019, 09:49 AM
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#52
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Established Member
Join Date: May 2019
Location: Reno
Posts: 42
M.O.C. #23970
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I never flush the tank with the valve closed. I'm going go buy an adjustable pressure regulator. My single regular cuts the pressure way too low about 30psi. I'm thinking 60psi is a safe good pressure.
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06-17-2019, 09:53 AM
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#53
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Established Member
Join Date: Mar 2016
Location: Lodi
Posts: 10
M.O.C. #18345
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Black tank & water pressure
Went to the local plumbing supply and purchased an residential inline pressure regulator. It comes complete with a pressure gauge and adjustment screw. Works great. I keep it at 60 psi.
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06-17-2019, 07:40 PM
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#54
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Established Member
Join Date: Sep 2015
Location: North Canton
Posts: 19
M.O.C. #17861
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Anytime you run water through the units piping use a pressure regulator.
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06-17-2019, 09:05 PM
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#55
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Montana Master
Join Date: Sep 2017
Location: Tacoma
Posts: 1,567
M.O.C. #20475
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I always run it through the pressure regulator witch is set 65 lbs.
__________________
Bob & Carol Washington St
2017 HC HM352RL 2018 Dodge 3500 laramie CC LB 4x4
Curt Q25 with puck system, Factory air bags
Happy Trails
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06-30-2019, 06:11 PM
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#56
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New Member
Join Date: Jun 2019
Location: Moncks corner
Posts: 1
M.O.C. #24393
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I have a 2004 3650rk and can’t find my sewer flush valve. I have hooked up to the female sewer flush connection but it does not flow and there is a warning label that I must open the sewer flush first. Is this the main black tank convenience center lever to drain the black tank? Or is it in another location.
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06-30-2019, 09:54 PM
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#57
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,400
M.O.C. #4831
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You have found the sewer flush valve. The warning sticker is an attempt to keep you from accidentally filling the black tank due to inattention.
If the flush is not flowing water it is a safe bet the check valve has failed. It is located behind the shower or under the bathroom sink. Most of us have plumbed around it. Do a Search on flush check valve for more details.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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07-02-2019, 07:58 PM
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#58
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,716
M.O.C. #24086
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Ok, just to be sure I got this right. The black thingy mounted to the white pex pipes under the bathroom sink (2019 Monty, 3130re) is a back flow preventer for the black tank cleaning system?
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07-02-2019, 08:01 PM
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#59
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,400
M.O.C. #4831
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That be it!
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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07-04-2019, 11:41 AM
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#60
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Montana Master
Join Date: Dec 2010
Location: Sioux Falls
Posts: 664
M.O.C. #10985
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If you are building pressure in your tanks your vent is plugged. There should be a direct atmospheric vent to all tanks.
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