I need some guidance prior to taking my camper to the RV shop. I have a 2013 Graywolf 26BH that we bought new. This problem just started this year, we're having a bad sewer smell. I use a good quality tank deodorizer and always flush with lots of water and never ever flush toilet paper down. This smell just started this year, we have never had this problem before this year.This year we have are getting a pretty bad odor not sure if its from the gray or black tank. I will tell you i always rinse the black tank at least twice after each use and don't appear to have any blockage or anything. Any suggestions on what this may be or any suggestions on correcting this problem would be appreciated.

I had a rotten egg smell and found it to be the water lines running to the washer hook up. I don’t have a washer but the lines had water int them and began generating a smell. I drained the lines which took care of the smell. Now the only smell I have is when my MIL comes in the trailer.

Possibly the air admittance valve, usually under the sink. example

But 'tank deodorizers' are suppose to 'cure' that problemSORRY ....being a bit sarcasticWhere is odor concentrated?Have you checked if smell is coming from an Air Admittance Valve?(On kitchen/bathroom sink drain lines after the 'P' traps---if stay open grey tank smells come back inside rv. Grey stinks as bad/worst then black tank)Have you checked battery....over charging/boiling etc can stink like rotten eggs

Odors happen sometimes, no seal is perfect. Could be gray or black tank, if you cook and then wash dishes, your gray tank isn't going to smell like roses.If you're creating a negative pressure inside the coach, like having an exhaust fan on or air conditioning on, hot outside, cold inside, but not enough windows open, nature will find someplace else to make up the air getting pulled out, including pulling it through the holding tanks.

Do you have a separate tank for your kitchen sink? I know that sometimes our galley tank would have an odor. We always try and make sure food doesn't go down the kitchen sink but when washing dishes there is always some food/grease that goes down the drain. I usually fill the tank full and let it sit a few hours and then drain it. Sometimes doing this a couple of times will clean the tank and take care of the odor. I wish they had a grey galley tank flushes like we have on the black tanks.Burch

I need some guidance on odor problem UPDATED! | Good Sam Community

GordonThree
Explorer
Jul 02, 2018
Odors happen sometimes, no seal is perfect. Could be gray or black tank, if you cook and then wash dishes, your gray tank isn't going to smell like roses.

If you're creating a negative pressure inside the coach, like having an exhaust fan on or air conditioning on, hot outside, cold inside, but not enough windows open, nature will find someplace else to make up the air getting pulled out, including pulling it through the holding tanks.
Old-Biscuit
Explorer III
Jul 02, 2018
But 'tank deodorizers' are suppose to 'cure' that problem

SORRY ....being a bit sarcastic

Where is odor concentrated?
Have you checked if smell is coming from an Air Admittance Valve?
(On kitchen/bathroom sink drain lines after the 'P' traps---if stay open grey tank smells come back inside rv. Grey stinks as bad/worst then black tank)

Have you checked battery....over charging/boiling etc can stink like rotten eggs
Lynnmor
Explorer
Jul 02, 2018
Possibly the air admittance valve, usually under the sink. example
amxpress
Explorer
Jul 02, 2018
I had a rotten egg smell and found it to be the water lines running to the washer hook up. I don’t have a washer but the lines had water int them and began generating a smell. I drained the lines which took care of the smell. Now the only smell I have is when my MIL comes in the trailer.

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I need some guidance on odor problem UPDATED!

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