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Old 08-30-2011, 10:37 PM   #15
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I am having this exact problem with my 4month old 5er. We are in the process of moving from AK to NC so I thought maybe it was the hotter temps causing the smell. But after reading here, I think mine is from the slight vacuum being caused by windows being left open (dogs are traveling in the 5er) and lack of water in tank as I may be dumping to often.
Thanks all and I will continue to look forward to your help!

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Old 08-30-2011, 11:24 PM   #16
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Well, when I didn't put any chemicals in the tank, my grand-daughter would let me know if it stank when she flushed. "Eewoo" is her word.
Me...my old nose don't work so good.

But you know us RVers, we are always looking for something to 'improve', so I've been spending way to much time looking at Cyclones, inline fans, & solar powered vent tops.

'94 Bounder 32h. Chevy V-8 44k miles and like new. Tow 4 down '85 Nissan 4x4 Kingcab
Retire in 1yr. 3mo. , but who's counting
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Old 08-31-2011, 01:17 PM   #17
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Due to the diesel prices, we use our camper for more like a home away from home, taking it to the coast in the summer and to our hunting lease in the winter. I noticed a smell when the temp got into the triple digits here in Texas. I double the amount of chemical during this sweltering heat and that took care of it. Also, make sure that you keep the black water tank valve CLOSED at all times so it will hold water and chemical and your waste until you are ready to dump, Then as someone said above, after you dump, fill the toilet 5 times with water, adding the chemical ( double in extremely hot weather) in the first or second toilet bowl full. That was the chemical dilutes with with all the water added. Just be sure to add chemical after every time you dump, even if you are headed home of it will smell as there is always a little residual waste laft in the tank even after you dump. I try to dump when my tank is at least half full or more. If you have a balck water wash out, attach the hose ( with the valve open )and let it spray the inside of the tank for about 15 minutes while you are packing to travel. When finished, shut your valve and add the 5 gallons of water and your chemical and your good to go.
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Old 08-31-2011, 02:56 PM   #18
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Horrific Sewer Smell

when I first started camping with my 5th wheel a friend told me in order to prevent sewer gas backing up just keep about 3-4 inches of water in the bottom of the bowl, it also makes flushing easier. If this does not work I would look at the vent pipe for an obstruction
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Old 09-05-2011, 02:36 PM   #19
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Well we took it camping for the first time since my "improvements". The Cyclone Sewer vent seemed to work like a champ. I made sure I added at least 5 gallons of water with chemicals prior to the trip and I never once smelled anything. Seems like the venting was the real problem. If anyone else has this problem I highly suggest and recommend the cyclone sewer vent. I can't believe what a difference that made and it was pretty easy to install.

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