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Old 02-11-2019, 08:24 PM   #1
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Question Tank vents

Have been experiencing some black tank odour.
Did usual cleaning etc. Went up on roof and put garden hose down the vent with full stream.. no blockage. I was surprised to see only one vent. That means the two grey tanks and black tank are all vented by one vent that is
1 1/2 inch pipe. Never had one vent always have had at least two.
Does your Crusader have one or more vents?
2017 Crusader 31 RST
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Old 02-11-2019, 08:42 PM   #2
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Sometimes odors can also come from gray tanks. I had that happen and used some gray tank deodorizer and it solved problem.
Also check air admittance valve, lots of times it's located under bathroom sink or kitchen sink
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Old 02-11-2019, 08:51 PM   #3
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Our 2014 Crusader 325RES has only one vent on roof

There are two air admittance valves - one under kitchen sink and one under bath sink

Be sure to run water after dumping black and grey tanks to keep water in the P traps

Also make sure you have a cover on your washer drain if you are not using it

Our grey rarely smells and black gets ripe in summer depending on temperature - we are seasonal and dump grey every weekend and black usually every two weeks
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