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waste venting [message #236397] Fri, 17 January 2014 11:10 Go to next message
sgltrac86 is currently offline  sgltrac86   United States
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Registered: April 2011
Location: BELLEVUE WA
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I have a 77 Royale driver side dry bath and am finishing the interior remodel. When I look at the venting for the waste I only see one vent line leaving the coach and it appears to only tie into the grey tank via the grey drain from the shower, kitchen and bath sink. Is there not supposed to be a black tank vent? Coach has two tanks, one grey and one black. The bathroom was remodeled by a p.o. and the bath rear wall was moved back 6". The wall is being moved back to its original location to allow 6' sleeping on both rear beds. I do not see any sign in the floor of another vent for black tank.

Thanks in advance.

Sully 77 Eleganza 2 ( Recherché ) Seattle, wa

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Re: waste venting [message #236399 is a reply to message #236397] Fri, 17 January 2014 11:20 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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Registered: March 2007
Location: S.E. Michigan
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sgltrac86 wrote on Fri, 17 January 2014 12:10

I have a 77 Royale driver side dry bath and am finishing the interior remodel. When I look at the venting for the waste I only see one vent line leaving the coach and it appears to only tie into the grey tank via the grey drain from the shower, kitchen and bath sink. Is there not supposed to be a black tank vent? Coach has two tanks, one grey and one black. The bathroom was remodeled by a p.o. and the bath rear wall was moved back 6". The wall is being moved back to its original location to allow 6' sleeping on both rear beds. I do not see any sign in the floor of another vent for black tank.

Thanks in advance.

Sully,

Are you saying that there is only vent through the roof of the coach? If that is the case, there is one missing. There is probably a vent connection between the gray and black tanks that you just have not found yet.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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Re: waste venting [message #236402 is a reply to message #236399] Fri, 17 January 2014 11:49 Go to previous messageGo to next message
sgltrac86 is currently offline  sgltrac86   United States
Messages: 49
Registered: April 2011
Location: BELLEVUE WA
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Member
i have all the cabinetry out to the exterior walls so I could make and apholster the wall skins/ hedliner and there are only two penetrations in the floor. One for the toilet and one for where the grey water leaves. Could they be tied together underneath??? it appears from how far apart the floor exits are that only the grey is vented but again I have not crawled underneath in awhile. Maybe I need to do that.

Sully 77 Eleganza 2 ( Recherché ) Seattle, wa

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Re: [GMCnet] waste venting [message #236448 is a reply to message #236397] Fri, 17 January 2014 18:43 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Registered: July 2007
Location: Sydney, Australia
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Sully,

On page 31 of the 1978 Coachman's Operating Manual there is a line drawing showing the location of two sewer vents on the roof.

http://www.bdub.net/manuals/coachmen_owners_manual-1978.pdf

On page 23 of the Avion Operator and Service Manual there is a line drawing of the drain system:

http://www.bdub.net/manuals/avion.pdf

As you can see one vent comes off the plumbing to the galley the second comes off the black tank directly. That vent is in the
closet just next to the closet door jamb.

I realize the Avion info may be of no help but I figgered what the hell maybe it will be.

Regards,
Rob M.


-----Original Message-----
From: Todd Sullivan

I have a 77 Royale driver side dry bath and am finishing the interior remodel. When I look at the venting for the waste I only see
one vent line leaving the coach and it appears to only tie into the grey tank via the grey drain from the shower, kitchen and bath
sink. Is there not supposed to be a black tank vent? Coach has two tanks, one grey and one black. The bathroom was remodeled by a
p.o. and the bath rear wall was moved back 6". The wall is being moved back to its original location to allow 6' sleeping on both
rear beds. I do not see any sign in the floor of another vent for black tank.

Thanks in advance.
--
Sully

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: [GMCnet] waste venting [message #236449 is a reply to message #236402] Fri, 17 January 2014 18:51 Go to previous messageGo to next message
sgltrac is currently offline  sgltrac   United States
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Registered: April 2011
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After closer inspection the vent coming out of the floor is coming from the black tank. The grey water drains tie into the black tank vent so the grey tank vents through the grey drain to some extent while water flowing. When no water flow the grey and black share the black vent.

Todd Sullivan

Sully
77 royale
Seattle

> On Jan 17, 2014, at 9:49 AM, Todd Sullivan <sgltrac@comcast.net> wrote:
>
>
>
> i have all the cabinetry out to the exterior walls so I could make and apholster the wall skins/ hedliner and there are only two penetrations in the floor. One for the toilet and one for where the grey water leaves. Could they be tied together underneath??? it appears from how far apart the floor exits are that only the grey is vented but again I have not crawled underneath in awhile. Maybe I need to do that.
> --
> Sully
> 77 Royale
> Seattle, wa
> Future land speed record holder fully equipped motorhome (bucket list)
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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Sully 77 Royale basket case. Future motorhome land speed record holder(bucket list) Seattle, Wa.

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Re: [GMCnet] waste venting [message #236533 is a reply to message #236397] Sat, 18 January 2014 14:53 Go to previous messageGo to next message
Ray Erspamer is currently offline  Ray Erspamer   United States
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Registered: May 2007
Location: Milwaukee Wisconsin
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In my 78 Royale, the black and grey tank venting is tied together in the lower drivers side cabinet where the leveling air pump system is located.


 
Ray
78 Royale - "The Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-484-9431
Web Site: http://ray-lisa.page.tl/


________________________________
From: Todd Sullivan <sgltrac@comcast.net>
To: gmclist@temp.gmcnet.org
Sent: Friday, January 17, 2014 11:10 AM
Subject: [GMCnet] waste venting




I have a 77 Royale driver side dry bath and am finishing the interior remodel. When I look at the venting for the waste I only see one vent line leaving the coach and it appears to only tie into the grey tank via the grey drain from the shower, kitchen and bath sink. Is there not supposed to be a black tank vent? Coach has two tanks, one grey and one black. The bathroom was remodeled by a p.o. and the bath rear wall was moved back 6". The wall is being moved back to its original location to allow 6' sleeping on both rear beds. I do not see any sign in the floor of another vent for black tank.

Thanks in advance.
--
Sully
77 Royale
Seattle, wa
Future land speed record holder fully equipped motorhome (bucket list)
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Ray Erspamer 78 GMC Royale Center Kitchen 403, 3.70 Final Drive Holley Sniper Quadrajet EFI System, Holley Hyperspark Ignition System 414-484-9431

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Re: [GMCnet] waste venting [message #236620 is a reply to message #236533] Sun, 19 January 2014 11:00 Go to previous message
sgltrac is currently offline  sgltrac   United States
Messages: 2797
Registered: April 2011
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Senior Member
Thanks Ray. That's what I kinda figured after some closer inspection.

Todd Sullivan

Sully
77 royale
Seattle

> On Jan 18, 2014, at 12:53 PM, Ray Erspamer <78gmc-royale@att.net> wrote:
>
> In my 78 Royale, the black and grey tank venting is tied together in the lower drivers side cabinet where the leveling air pump system is located.
>
>
>
> Ray
> 78 Royale - "The Great Lakes Eagle"
> Center Kitchen TZE368V101144
> Wauwatosa, Wisconsin 53226
> Email: 78GMC-Royale@att.net
> 414-484-9431
> Web Site: http://ray-lisa.page.tl/
>
>
> ________________________________
> From: Todd Sullivan <sgltrac@comcast.net>
> To: gmclist@temp.gmcnet.org
> Sent: Friday, January 17, 2014 11:10 AM
> Subject: [GMCnet] waste venting
>
>
>
>
> I have a 77 Royale driver side dry bath and am finishing the interior remodel. When I look at the venting for the waste I only see one vent line leaving the coach and it appears to only tie into the grey tank via the grey drain from the shower, kitchen and bath sink. Is there not supposed to be a black tank vent? Coach has two tanks, one grey and one black. The bathroom was remodeled by a p.o. and the bath rear wall was moved back 6". The wall is being moved back to its original location to allow 6' sleeping on both rear beds. I do not see any sign in the floor of another vent for black tank.
>
> Thanks in advance.
> --
> Sully
> 77 Royale
> Seattle, wa
> Future land speed record holder fully equipped motorhome (bucket list)
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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Sully 77 Royale basket case. Future motorhome land speed record holder(bucket list) Seattle, Wa.

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