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09-22-2019, 06:02 PM
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#1
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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Vents on roof
In the attached picture you can see we have 4 black pipes/vents on the roof plus one flat white one.
Based on the location I am hoping that the one black vent that I added the finned venturi to is the black tank vent (it is in the wall directly behind the commode and the commode sits directly over the tank).
However there are three more vents forward and to the right of that location all together. I am guessing that there is a vent on each of the two gray tanks but what would the third one be for??
Then there is that flat white vent towards the rear of the unit??
__________________
James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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09-22-2019, 06:17 PM
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#2
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Montana Master
Join Date: Oct 2015
Location: westminster md
Posts: 2,321
M.O.C. #17894
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I added those vents to all my vent stacks. Why just one, do them all. The flat looking one is an attic vent. usually there are 2
. 1 front and 1 rear.
__________________
2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
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09-22-2019, 08:01 PM
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#3
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Montana Master
Join Date: Mar 2016
Location: Catoosa
Posts: 780
M.O.C. #18384
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Well Jim, you could always give it the sniff test
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2015 3100RL legacy...2005 Ford F-250 CC SB. Tows like a charm! 4/19 Updated to 2017 Chevy 3500 CC SB SRW -hope it tows as well as my F 250 did!
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09-22-2019, 09:13 PM
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#4
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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I was just trying out the venturi to see if it actually would pull the slight black tank odor out a little better. It does seem to make a difference but we are also out of the worst of the summer heat too.
More curious in what the extra vent would be. We have three tanks so why 4 vents???What is the extra one for?
I have heard that the flat one is an attic vent. So there is actually a space between the roof and interior ceiling? I figured there wasn't any space there or if it was it was full of insulation?
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James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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09-23-2019, 05:45 PM
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#5
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Montana Master
Join Date: Oct 2015
Location: westminster md
Posts: 2,321
M.O.C. #17894
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Just a guess , but how about a clothes washer vent.
__________________
2018 Chevy 3500 LTZ Dually Diesel 4x4 CCLB
2011 Montana 3455 SA. 6 point level up. Disc brakes. Curt Q24 Hitch. 5 step glow steps
Progressive EMS. Valterra tank valves. Sailun G637 tires. ARP fridge control. All led lighting. Mor Ryde IS
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09-24-2019, 04:40 AM
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#6
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Seasoned Camper
Join Date: May 2019
Location: La Center
Posts: 53
M.O.C. #24001
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Judging by the floor plan on your unit, I'd guess one is for freshwater.
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09-24-2019, 08:35 AM
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#7
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Established Member
Join Date: Sep 2019
Location: Amarillo
Posts: 23
M.O.C. #24911
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isn't the fresh water vent on the side (wall) of the trailer?
__________________
2018 Montana HC 305RL; Sailun S637
2015 Chevy CC SRW 2500 dMax w/Firestone air bags, B&W Companion Slider Hitch
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09-24-2019, 11:15 AM
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#8
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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My guess would be the drain for a washer, but might it not be that they ran an extra vent instead of bath sink and shower grey combined or do you have two sinks in your layout and not just one? Yes, there is space there. Look up and sort of sideways through the shower skylight. Just guessing here.
__________________
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.
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09-24-2019, 03:07 PM
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#9
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,710
M.O.C. #7992
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Quote:
Originally Posted by mtlakejim
I have heard that the flat one is an attic vent. So there is actually a space between the roof and interior ceiling? I figured there wasn't any space there or if it was it was full of insulation?
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There is space between the roof and the ceiling. The vent is often refereed to as a mushroom vent. The white disc you see on the roof is attached to the base plate via a threaded rod. They do tend to get loose over time so whenever on the roof hand tighten them by rotating the disc clockwise. If you don't a future visit to the roof may reveal a missing disc. That's if your lucky. If not lucky water spots on your ceiling will reveal the same thing.
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2006 3000RK
2009 Ram 2500
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09-25-2019, 04:27 AM
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#10
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Seasoned Camper
Join Date: May 2019
Location: La Center
Posts: 53
M.O.C. #24001
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Quote:
Originally Posted by LoneStar
isn't the fresh water vent on the side (wall) of the trailer?
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I was just speculating since it's a toy hauler. The freshwater tank is likely located over the axles. That's where most toy haulers carry the freshwater tank instead of in the back. My previous trailer was a toy hauler, although from a different manufacturer. Maybe they didn't have room for a side vent because of slide outs in that area. Just speculation, of course.
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09-25-2019, 08:56 AM
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#11
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Montana Master
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,896
M.O.C. #9561
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the 'pancake' white vent is something that keystone puts on some of their trailers to vent the roof.
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09-25-2019, 11:40 AM
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#12
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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Okay so since no one has asked yet and it has been a few days since Jim has been cranked up, I'll ask it.
Why didn't you ask about it during your PDI?
I know I will pay for that one later.
__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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11-01-2023, 10:14 AM
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#13
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Established Member
Join Date: Sep 2023
Location: St Augustine
Posts: 30
M.O.C. #33414
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Quote:
Originally Posted by beeje
I added those vents to all my vent stacks. Why just one, do them all. The flat looking one is an attic vent. usually there are 2
. 1 front and 1 rear.
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Any idea where you can get replacement vent covers at for those?
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11-01-2023, 10:16 AM
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#14
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Established Member
Join Date: Sep 2023
Location: St Augustine
Posts: 30
M.O.C. #33414
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Quote:
Originally Posted by jimcol
There is space between the roof and the ceiling. The vent is often refereed to as a mushroom vent. The white disc you see on the roof is attached to the base plate via a threaded rod. They do tend to get loose over time so whenever on the roof hand tighten them by rotating the disc clockwise. If you don't a future visit to the roof may reveal a missing disc. That's if you’re lucky. If not lucky water spots on your ceiling will reveal the same thing.
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Any idea where I can get replacement vent covers? One is cracked
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11-01-2023, 10:59 AM
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#15
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,398
M.O.C. #4831
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Mushroom vents can be found almost anywhere. There are numerous Threads here about them. Do a Search on "mushroom vent" to find more information.
Amazon has the two piece replacements.
https://www.amazon.com/d/Automotive-...room+roof+vent
Here is a link to a site that sells just the top piece which is all most need. And it is much cheaper.
https://rvandmarine.com/product/mushroom-vent-cap-only/
__________________
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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11-01-2023, 11:24 AM
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#16
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Montana Master
Join Date: Jan 2018
Location: Austin
Posts: 2,433
M.O.C. #21044
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My caps are completely roached. Judging from the pic in the rvandmarine.com link Carl provided - the rotten cap simply unscrews to remove it?
__________________
MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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11-01-2023, 11:44 AM
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#17
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Montana Master
Join Date: Oct 2015
Location: westminster md
Posts: 2,321
M.O.C. #17894
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Yes the top portion of the mushroom cap simply on the screws Lefty Loosey. I put a dab of silicone on the new ones so they wouldn't untwist off
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11-01-2023, 08:44 PM
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#18
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,712
M.O.C. #12947
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That fourth vent by itself to the rear wouldn't possibly be a vent for the toy hauler garage area?
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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