Aquamist HFS-3 and MINI Tank GB

[Howerton Engineering]

(10-07-2011 11:34 AM)LASRGUY Wrote:  Tank leak?
When I fill my tank above about 7/8 full it is leaking out until the tank level drops to about 7/8 full. I don't think this could be normal. Anyone else see this? I'm about to pull the tank assembly to see if I can find the leak.

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Now that I'm looking at the tank I think it's just coming out the vent hose. I'll just be careful not to fill the tank to the rim next time.

The vent is in the front of the tank. So unless inclined it shouldn't unless the hose is full and siphons out. We can put a CV in the line that is a push-pull and works well, but costs a bit more.

There is a small baffle at the inlet of the vent so a lot of fluid should not get in the line normally. Does this happen right as you fill, or after driving?

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One more thought. Are you filling with a funnel that is sealing to the top neck of the tank? In may not seem like it does, but if it provides a light seal, it will create an air lock and the filling will just pour out the vent line. If we have a CV int he vent line, it would just back up into the funnel, but drop creating a big mess, been there before.