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06-24-2014, 02:38 PM #11
- Join Date
- Sep 2013
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- Bristol & Middlebury, Indiana
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Hi Jim and Ginnie (@Tucson Jim),
All black and grey tanks are vented through the roof. The valve under the sink is an air admittance device (ASTVD = anti-siphon trap vent device) which draws air in when water is draining to slow the process so the p-trap is not completely void of water following the drain process. This valve has a diaphragm that is closed when not draining. Grey tank odors are generally associated with a dry p-trap or a bad diaphragm in the ASTVD.
Best regards,
~ JaniceMailing & shipping address: Grand Design RV, Attn: Customer Support, 13868 CR 4, Bristol IN 46507
Hours: Monday - Friday (8:00 am - 5:00 pm EST, closed holidays)
- Phones: Grand Design RV Corporate at (574) 825-8000 or Customer Support (direct) at (574) 825-9679
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For EMERGENCY or immediate assistance contact your RV dealer or GDRV Customer Support directly at (574) 825-9679 with your 17-digit RV VIN, name, and phone number.
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07-05-2014, 03:58 PM #12
Thanks Janice. My p-trap was full of water. The odor was coming from the ASTVD which had a defective diaphragm. The replacement was purchased from Lowes, and no further issues have been encountered. The repair took about five minutes. I realize the tanks are vented to the roof, but as you mentioned, the drain line for the bathroom sink (and kitchen) are protected by the ASTVD.
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07-11-2014, 08:08 PM #13
- Join Date
- May 2014
- Location
- Henderson, NC
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- 171
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Thanks Jim and Janice for the tip. We are having issues with ours in the kitchen. I will purchase one tomorrow and replace it.
Replaced the AAV under the kitchen sink and it fix our odor problem. I replaced it with the more expensive unit at $23 verses the exact replace that cost $6. Worth the difference and hope it works for a long time. Thanks for everyone's suggestions.Kamper
Johnny & Mary
Henderson, NC 4 Now
2014 Solitude 369RL
2015 Silverado 3500HD Crew Cab High Country
24K Pullrite ISR 5th Wheel Hitch with Super Rails
:cool:
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10-16-2014, 02:31 AM #14MaikyFulsGuest
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10-16-2014, 06:40 AM #15
- Join Date
- May 2014
- Location
- New Hampshire
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- 287
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I bought one at Home Depot and keep it in my storage compartment so when I need it I got it. This way when I'm camping I don't have to go looking for a Lowe's or Home Depot.
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07-15-2015, 10:53 PM #16
- Join Date
- May 2015
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I too, just experienced this horrendous stench from under the kitchen sink in the island. Went to Home Depot and purchased 2 new ASTVD's, one for the kitchen and one for the bathroom. Ironically both of them were installed without teflon tape, and so loose that a 3 year old could have easily removed them. Shame on GD!! I am disappointed that a coach with over a $100,000 MSRP could be this shoddy. I also had a ceiling panel that had been damaged prior to delivery and someone had tried to cover it up with drywall mud....seriously. Toilet flush peddle leaks badly, I took it in to the dealer two weeks ago and have yet to hear from the dealer about fixing it. Again, disappointing, both in the lack of attention to detail in design and construction, and lack of customer service from the dealer. There are a lot of other issues I have taken care of myself, just because it would be too much of a pain to try get get warranty work done on them. Our American service system is broken and getting worse by the day......
Mark and Janell aka Blue Moon Explorers
2015 RAM 3500 4WD CTD CC Dually Aisin 4.10
2015 Momentum 380TH
Salida, CO
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07-16-2015, 05:37 AM #17james quinnGuest
The AAV doesn't actually slow the process but rather prevents a vacuum forming when draining which would cause the water to be drawn out of the trap and allowing sewer gases to escape. How a trap works is that when the water is draining at the tail end you will get a little bit of air that can pass thru at the very top part of the 'P' and that breaks the vacuum which allows the remaining water in the trap to fall back down to the bottom of the trap to form the 'seal'. In order for there to be air to do this there needs to be a vent pipe or alternatively an AAV. The type of vents don't work very well with washing machines as they cannot keep up.
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07-16-2015, 08:58 AM #18
- Join Date
- Jun 2014
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- 102
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So.. how much do you think would it have cost to have a authorized dealer fix it. My first guess would be, (parts and labor), $250-$350. GD made out on this deal.
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07-16-2015, 12:43 PM #19Traveling PiperGuest
TucsonJim, what a timely post. Thank you so much!! We have been camping for 5 days and yesterday the rotten egg smell from around our main bath was bad- we had no idea what it was. As the day grew long it got horrible. Went up on roof in dark to check roof vent- drained all tanks in the dark, and finally could track this smell that permeated the entire trailer by this time to the main bathroom near the sink area??? We had never heard of this anti syphon thing- just assuming all plumbing was vented outside. I got out my ipad, searched the forum and this evening we are stink free. We bought 2 extra- it was difficult to sleep last night with that going on. Now we know we could have taped off bathroom AC vent- opened exhaust fan- and shut bathroom door until we could get to hardware store today- hind sight is great.
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07-16-2015, 02:35 PM #20
- Join Date
- Mar 2015
- Location
- Owasso, OK
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- 249
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Wow, really timely. Have the exact issue, and same rotten egg smell when gray tanks get about 2/3 full. thought was a leak in the tanks. Dealer said prob this device, and have scheduled repair. But, I'll just get it and install myself. Another shoddy piece of material somebody unloaded on GD? Never had this prob with my Keystone Passport. thanks for the info!
Don and Anita
Oklahoma
2015 RAM 2500 Cummins Diesel Laramie Edition
2017 Reflection 337
Anderson Ultimate Hitch/B&W Companion...depending on weight
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