Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > MOC Technical Forums > Maintenance
Click Here to Login

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-27-2023, 08:46 AM   #1
RRBurroughs
New Member
 
Join Date: May 2023
Location: Talking Rock
Posts: 6
M.O.C. #32762
Line Drain for tanks

Good morning! We are complete NEWBIES, in all sense of the word. The line drain pulls in outside control door, should they be pulled out or pushed in when we are parked? We are trying to rid the rv of drain smell and trying all possibilities.
 
RRBurroughs is offline   Reply With Quote
Old 05-27-2023, 09:11 AM   #2
1retired06
Montana Master
 
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,755
M.O.C. #12156
Your black valve should remain closed except when you dump. Grey lines can remain open. Some folks prefer to leave gray valves closed which is fine as long as you remember to dump. We keep our greys open until a day or two before we dump the black and then dump after dumping both of the black tanks.
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
1retired06 is offline   Reply With Quote
Old 05-27-2023, 10:21 AM   #3
Mikendebbie
Montana Master
 
Mikendebbie's Avatar
 
Join Date: Jan 2018
Location: Austin
Posts: 2,279
M.O.C. #21044
Not exactly on topic - but I make it a practice to drive with the gray and black tanks almost empty. That would be a lot of weight bouncing on the highway and they are not held up in the frame with sustantial support. Lots of folks here have added support for the tanks.
__________________
MikenDebbie Aggie Ď77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
Mikendebbie is offline   Reply With Quote
Old 05-27-2023, 12:10 PM   #4
Carl n Susan
Site Team
 
Carl n Susan's Avatar
 
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,140
M.O.C. #4831
The black tank drain should be pushed in (closed) when parked. You only want to open it when you dump. That way you achive a good hydraulic flow effect to get all the solids out. If you leave the valve open when parked, the liquids drain out but the solids don't. This results in the dreaded pyramid of poop and dried out mound that will block furture use.

The grey tanks (you do know there are two?) can be left open (particularly if you have a washer/dryer that drains to the shower tank) or closed (dump them before they get too full, ideally when you dump the black tank to help clean the drain line). If you leave them open (which we do), be sure to build a "trap" in the line to avoid a clear path for sewer gasses to return to the RV.

And one last point, If you weren't aware of the two grey tanks (shower and galley), then perhaps you don't know there are two separate pull handles. One in the convenience center which is easily found. The other is under the RV on the drivers side, somewhere near the wheels In front, between, or aft) depending on the model.
__________________
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

Carl n Susan is offline   Reply With Quote
Old 05-27-2023, 02:09 PM   #5
DutchmenSport
Montana Master
 
DutchmenSport's Avatar
 
Join Date: Oct 2018
Location: Anderson
Posts: 2,379
M.O.C. #22835
Valves closed until ready to dump. As stated above, solids stay behind and liquids drain off ... EVEN in grey tanks. Soap skum, food particles, grease all remain behind causing smells.

I use an enzyme eater in my tanks after every dump. It takes only 1 ounce. It's designed for cleaning pipes in the house, but in addition to keeping pipes in the camper cleaned out, it also aids in breaking down any remaining solids that don't make it out of the tanks. The longer it sits in the tank, the better it does. This also helps keeps smells at bay.

Another trick you can try is to attach a Flush King valve on the end of your discharge outlet where the black and grey water come together. Attach the valve and dump the black tank. Now close the Flush King valve and open the grey water. This will "back flush" into the black tank. Let the 2 tanks equalize (about 10 seconds), close the grey tank now so no black water flows back into the grey tank, and open the Flush King and drain the black tank again. This back flushing will pull so much more "stuff" from the black tank, you'll be amazed.... especially when you see it through the clear section of pipe on the Flush King valve. Repeat this 2 more times with the grey water and your black tank will immediately be much cleaner. And this process takes no more time than normal dumping. I've been doing this on 4 different trailers for over 25 years now and never miss doing the back flush at least 1 time every time I dump the tanks.

Between the enzyme eaters and the back flushing, you'll get rid of the smells after a couple or 3 times of dumping.
__________________
Who you are right now is a sum total off all you use to be.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
DutchmenSport is online now   Reply With Quote
Old 05-27-2023, 05:57 PM   #6
Daryles
Montana Master
 
Daryles's Avatar
 
Join Date: May 2019
Location: Alton
Posts: 2,503
M.O.C. #24086
Look under your sink for a round black plastic "air admittance valve".
Sometimes they go bad and allow tank odors to come up.
To troubleshoot, put a baggie over it and tape/tie it closed tight. If the smell stops, that's it. You can take it to a hardware store to match it with a new one (keep the bag over the pipe to keep the smell out).
__________________
Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
Daryles is offline   Reply With Quote
Old 05-27-2023, 06:44 PM   #7
RRBurroughs
New Member
 
Join Date: May 2023
Location: Talking Rock
Posts: 6
M.O.C. #32762
Thank you all SO much!!! Have great weekend and stay safe!
RRBurroughs is offline   Reply With Quote
Old 05-31-2023, 02:19 PM   #8
BuckandTeresa
Seasoned Camper
 
Join Date: Aug 2019
Location: Monument
Posts: 94
M.O.C. #24683
Drain Pulls

By the way, the drain pulls are probably not labelled--"IN" is closed, OUT is "Open". My very first trip I didn't know which was which, as my walk-through guy didn't point them out. Turns out they left all three full open, drain cap on. I hate to tell you what it was like when I removed the cap after three days to drain all tanks.... let's just say I should have had a snorkle and mask on!!
BuckandTeresa is offline   Reply With Quote
Old 06-01-2023, 04:55 AM   #9
ElizaBeads
Established Member
 
Join Date: Sep 2020
Location: Columbus
Posts: 12
M.O.C. #27029
Black tank should always be closed unless flushing the black water tank ..if you leave the black water tank open you will build a pyramid.. Grey water tanks should remain open
ElizaBeads is offline   Reply With Quote
Old 06-01-2023, 09:47 AM   #10
Foldbak
Montana Master
 
Foldbak's Avatar
 
Join Date: Jan 2022
Location: Shingle Springs
Posts: 1,889
M.O.C. #30417
We leave all tanks closed until ready to dump. We had a black tank smell our first couple trips out. Discovered that if I flush the black at least three times and then fill with three gallons of water and two pods there is no smell.
__________________
Tony & Donna
2022 Montana High Country 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
Foldbak is offline   Reply With Quote
Reply

Tags
drain, drain smell, pull, tank, water

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
Forum Jump

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 03:36 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2023, vBulletin Solutions, Inc.