Home » Public Forums » GMCnet » Plumbing vents, do we really need three?
| Plumbing vents, do we really need three? [message #292943] |
Sat, 26 December 2015 14:46  |
zhagrieb
Messages: 676
Registered: August 2009
Location: Portland Oregon
Karma: 0
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Seems to me one rooftop vent would be enough to carry away any smells from the waste tank. Do we really need one from each of the sinks as well?
Glenn Giere, Portland OR, K7GAG
'73 "Moby the Motorhome" 26'
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| Re: Plumbing vents, do we really need three? [message #292944 is a reply to message #292943] |
Sat, 26 December 2015 15:11  |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Glen.
There are a couple of rules of thumb when it comes to plumbing.
1- S#!t flows Down hill
2- Get air behind the s#!t so it can flow.
The vents are there to bring air to the down flow side of the water traps. If you don't the traps will get sucked dry and the blank tank foul air will come onto the coach through the drain pipes.
There is a vent very close to each trap. They may connect in the coach before going outside but its cheaper and easier to go straight out. Your house is the same way.
"Pepe le pwew"
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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| Re: Plumbing vents, do we really need three? [message #292946 is a reply to message #292943] |
Sat, 26 December 2015 15:18 |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Senior Member |
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Glen.
There are a couple of rules of thumb when it comes to plumbing.
1- S#!t flows Down hill
2- Get air behind the s#!t so it can flow.
The vents are there to bring air to the down flow side of the water traps. If you don't the traps will get sucked dry and the blank tank foul air will come onto the coach through the drain pipes.
There is a vent very close to each trap. They may connect in the coach before going outside but its cheaper and easier to go straight out. Your house is the same way.
"Pepe le pwew"
Herei a simple plumbing diagram that might have two vents to the roof.
http://media.web.britannica.com/eb-media/84/102384-036-DF67E9B3.gif
Note that every trap has an air supply.
Best regards
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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| Re: Plumbing vents, do we really need three? [message #292949 is a reply to message #292943] |
Sat, 26 December 2015 16:07 |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Senior Member |
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POP QUIZ!!!
I just uploaded a photo from the internet illustrating a simple plumbing installation. I just see it has a mistake. Can you identify it?
A test to see if you were paying attention to my comment. (Must be the teacher in me eh?) (Dont trust everything you see on the internet I guess)
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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| Re: Plumbing vents, do we really need three? [message #292951 is a reply to message #292949] |
Sat, 26 December 2015 16:19 |
appie
Messages: 902
Registered: April 2013
Location: denmark
Karma: 2
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Funny. We dont have these vents in plumbing here in europe. And our houses do not smell
Appie
eleganza 76 "Olga" now sadly sold
6 wheel discbrake
Quadrabags
Springfield stage 2 462 olds
Manny tranny
( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
Fulltiming in Europe july 2014 til july 2016
Denmark
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| Re: Plumbing vents, do we really need three? [message #292957 is a reply to message #292943] |
Sat, 26 December 2015 17:29 |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Senior Member |
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Yup. I was in Amsterdam last summer at my cousins place and the sinks gurgled as they drained snd a while after. It was s newer place (less than 20 years old I would guess.) I wondered why code didn't require venting. One of those mysteries I suppose. In much of North America. Plumbing rules require some kind of venting to nutralize plumbing pressures.
I'm glad you have no stinks!
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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| Re: Plumbing vents, do we really need three? [message #292966 is a reply to message #292943] |
Sat, 26 December 2015 18:11 |
Adrien G.
Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624
Karma: 1
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Glenn,
I removed the vent between the fridg module and shower module, then tapped in on the rear vertical vent
to create the lavatory drain vent. It takes 2 vents, unless kitchen sink, lavatory, shower are all on one side,
then maybe can make it with one vent.
Just what I did.
Adrien & Jenny Genesoto
75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild
Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
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| Re: Plumbing vents, do we really need three? [message #292968 is a reply to message #292943] |
Sat, 26 December 2015 19:34 |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Senior Member |
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LOFFEN. THANKS for giving it a go. SORRY There is a red line to the dish washer (hot) blue or cold not needed.
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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| Re: [GMCnet] Plumbing vents, do we really need three? [message #292973 is a reply to message #292946] |
Sat, 26 December 2015 20:04 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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John,
Sounds like that's also the reason for these:
http://www.zoro.com/oatey-plain-in-line-vent-abs-39012/i/G0704597/?gclid=CjwKEAiAkvmzBRDQpozmt-uluCQSJACvCd1lGLWPYhc-Q7CjyzOD4ORkHsaXadhvjv6hCttQXSZXb hoCzBzw_wcB&gclsrc=aw.ds
or
http://goo.gl/mgEyCw
There's one in the drain line from the sink in my X-Birchaven, much closer
to the sink than to the downstream vent stack. It was installed by
Coachmen so I kept it when I rebuilt "everything", not really knowing why.
I just offered a new one I have to a local GMCer who's currently rebuilding
his plumbing. Exactly where should he use it (IF he should)?
TIA,
Ken H.
On Sat, Dec 26, 2015 at 4:18 PM, John Heslinga wrote:
> Glen.
>
> There are a couple of rules of thumb when it comes to plumbing.
>
> 1- S#!t flows Down hill
> 2- Get air behind the s#!t so it can flow.
>
> The vents are there to bring air to the down flow side of the water
> traps. If you don't the traps will get sucked dry and the blank tank foul
> air
> will come onto the coach through the drain pipes.
> There is a vent very close to each trap. They may connect in the coach
> before going outside but its cheaper and easier to go straight out. Your
> house is the same way.
>
> "Pepe le pwew"
>
> Herei a simple plumbing diagram that might have two vents to the roof.
> http://media.web.britannica.com/eb-media/84/102384-036-DF67E9B3.gif
>
> Note that every trap has an air supply.
>
> Best regards
>
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: Plumbing vents, do we really need three? [message #292983 is a reply to message #292943] |
Sat, 26 December 2015 21:58 |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Senior Member |
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OH Yes: The Vacuum Valves are a usable option. Its also good for when installing a vent line is just not possible. Kitchen Islands are a common place to use one. Getting the Air behind the water is what it's all about.
A Coach that has 3 vents in the roof prabably did not have one of these valves.
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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| Re: [GMCnet] Plumbing vents, do we really need three? [message #292985 is a reply to message #292979] |
Sat, 26 December 2015 22:01 |
Dave Mumert
Messages: 272
Registered: February 2004
Location: Olds, AB, Canada
Karma: 0
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There are waterless traps available for use in RVs.
http://www.hepvo.com/
Might be a good choice as they eliminate the need for a vent, plus they don't need to be winterized.
Dave
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of John Wright
> Sent: Saturday, December 26, 2015 7:48 PM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Plumbing vents, do we really need three?
>
> It is common practice where there is not a DW vent to use a Studor air admittance vent for sinks or lines that do not vent stacks.
In the
> stretch the Kitchen sink and bath sink drain line did not have a roof vent. I added a studor vent under the kitchen sink to
allow air into
> the drain line to the gray tank and that resolved any gurgling issues and vent issues. The Kitchen sink in our house is located
in an area
> where no roof vent lines would fit and we used a studor vent and it has worked for 10 years and it is what my plumber suggested
for
> that application and they meet code. These work very well and prevent sewer gases from entering your house.
>
> http://www.ipscorp.com/plumbing/studor/redivent
>
> J.R. Wright
> 30' Buskirk Stretch
> Michigan
> On Location in Tucson
>
>
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| Re: [GMCnet] Plumbing vents, do we really need three? [message #292987 is a reply to message #292985] |
Sat, 26 December 2015 23:27 |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
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The washing machine trap and stand pipe are incorrect.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
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| Re: Plumbing vents, do we really need three? [message #292998 is a reply to message #292943] |
Sun, 27 December 2015 10:08 |
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John Heslinga
Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada
Karma: 4
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Senior Member |
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Yes!! Christifer and Hal are both correct.
Both of those installations will allow drain line fumes to enter the home.
That was a bad illustration for me to use. I chose another but this one seemed simpler. I did not see the mistakes before I Uploaded it. Hal and Chris Get the Big Salute and Hand Clap award For today!!!
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:70 LS,
Red Seal Journeyman, DTE, BEd. MEd.
Edmonton, Alberta
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| Re: Plumbing vents, do we really need three? [message #293006 is a reply to message #292943] |
Sun, 27 December 2015 15:40 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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You have your choice - the Cut Glass Flyswatter, or the Furlined Syrup Pitcher.
==johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Plumbing vents, do we really need three? [message #293008 is a reply to message #292957] |
Sun, 27 December 2015 16:39 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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John Heslinga wrote on Sat, 26 December 2015 16:29Yup. I was in Amsterdam last summer at my cousins place and the sinks gurgled as they drained snd a while after. It was s newer place (less than 20 years old I would guess.) I wondered why code didn't require venting. One of those mysteries I suppose. In much of North America. Plumbing rules require some kind of venting to nutralize plumbing pressures.
I'm glad you have no stinks!
That's because Dutch poo doesn't stink--haha
Bob de Kruyff
78 Eleganza
Chandler, AZ
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