black tank roof

mmiille wrote:

beemerphile1 wrote:

Bobbo wrote:
I have had these since I bought the RV and never had a problem.

Same here. Those Cyclone vent caps are supposed to draw the fumes from the tank but it is impossible. The waste tank is a closed system, for fumes to be drawn from the tank it would create a vacuum and that isn't going to happen. The Cyclone is a tax on gullibility.

I have the Cyclone and it works. I had smells in the RV when driving down the road. After installing the new vents the oders went away. The closed system wouldn't need a vent if there were no gases created. The cyclone doesn't suck the gases out, it just directs them away.

I had to replace the original cap that was like Bobbo's because it was cracked. Got a Cyclone - I don't know if it works better than the original - all I know is it looks really cool on my RV.

And... I can tell which way the wind is blowing.... :C