Greetings. We would like to install a Cyclone RV Holding Tank Vent on the black tank to hopefully reduce black tank odors.The problem is on our roof, the black tank and the grey tank vents are identical in appearance and side by side, within inches of each otherIs there a way to easily identify which one is the Black tank vent? I proposed that my DW crawl up there and sniff each one, but that ain't happening!

From the roof run some water down either vent pipe then see which tank it goes into.

How I did mine. The tank was empty. I put a few cups of Pinesol in the black tank, wedged the toile valve open and aimed a small fan down the toilet. Went up on the roof and the pipe with the strong Pinesol smell coming out was the one that got the cyclone.

No more than they cost, put one on each pipe.Jim

In my case, I found that the source of odor was not the black tank. It was the gray tank. I put the vane on my gray tank and took care of odors while driving.

Jim-Linda wrote:No more than they cost, put one on each pipe.JimI am afraid the they are too close to each other and would interfere with each other. If you want to send me $20.00 I will try it. LOL

Which vent pipe is the Black Tank? | Good Sam Community

18 Replies

John_Joey
Explorer
Oct 21, 2013
Dog Folks wrote:
I proposed that my DW crawl up there and sniff each one, but that ain't happening!

Just tell the DW to stop being a baby. RV'ing is a team hobby.
pigman1
Explorer
Oct 21, 2013
Cup of red food color then dump.
Kemahsabe
Explorer
Oct 21, 2013
Big Katuna wrote:
How I did mine. The tank was empty. I put a few cups of Pinesol in the black tank, wedged the toile valve open and aimed a small fan down the toilet.
Went up on the roof and the pipe with the strong Pinesol smell coming out was the one that got the cyclone.

Smart!
Dog_Folks
Explorer II
Oct 21, 2013
Jim-Linda wrote:
No more than they cost, put one on each pipe.

Jim

I am afraid the they are too close to each other and would interfere with each other.

If you want to send me $20.00 I will try it. LOL
hershey
Explorer
Oct 21, 2013
In my case, I found that the source of odor was not the black tank. It was the gray tank. I put the vane on my gray tank and took care of odors while driving.
Jim-Linda
Explorer II
Oct 21, 2013
No more than they cost, put one on each pipe.

Jim
Big_Katuna
Explorer II
Oct 21, 2013
How I did mine. The tank was empty. I put a few cups of Pinesol in the black tank, wedged the toile valve open and aimed a small fan down the toilet.
Went up on the roof and the pipe with the strong Pinesol smell coming out was the one that got the cyclone.
powderman426
Explorer
Oct 21, 2013
From the roof run some water down either vent pipe then see which tank it goes into.

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Which vent pipe is the Black Tank?

18 Replies

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