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  #1  
Old 05-07-2012, 07:03 PM
dsm1gb dsm1gb is offline
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Default Air in the lines

So Im having an issue where I'm building up air in the lines or tank. If I manually operate the system and push the air out it works for a few days with full bars but then eventually drops bars, and then no bars. I have to repeat the process every other day. My tank is not vented so I'm not sure where the air is entering.
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Old 05-07-2012, 07:57 PM
Richard L Richard L is offline
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Default Re: Air in the lines

Is the air in the 6mm or the 4mm line?
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Old 05-07-2012, 09:52 PM
dsm1gb dsm1gb is offline
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Default Re: Air in the lines

I'm not sure, but I believe it's the 6 mm line since its affecting the flow sensor readings. My pump is also mounted upside down, would this affect it?
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Old 05-07-2012, 11:01 PM
Richard L Richard L is offline
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Default Re: Air in the lines

The only place where air can be sucked in has to be the inlet side of the tank. If you do not have a vent hole in the tank, the water/methanol cannot come out of the tank as the vacuum builds up internally.

Put a small pin hole about 1mm on the cap and tell me if it solves the problem.
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Old 24-07-2012, 12:44 AM
dsm1gb dsm1gb is offline
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Default Re: Air in the lines

I Put a hole in the cap, there also is a rubber seal on the cap that I didn't drill through, but it's still the same.
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Old 24-07-2012, 05:15 AM
Howerton Engineering
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Default Re: Air in the lines

It sounds like you have a leak pre-pump. Can you post a picture of the tank/pump setup?

The suction of the pump is strong enough to pull the air in. Re check the lines/filters from the tank to the pump.
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Old 27-07-2012, 08:44 PM
dsm1gb dsm1gb is offline
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Old 27-07-2012, 08:57 PM
Howerton Engineering
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Default Re: Air in the lines

Does it make a difference if the tank is full or half empty? You could have a sloshing problem. Air doesn't always pass through the pump, but will sit in the head and cause issue for a while.

Is the fitting on the tank leaking air in under suction?
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Old 27-07-2012, 09:42 PM
dsm1gb dsm1gb is offline
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Default Re: Air in the lines

I haven't noticed if the tank level makes a difference I will check that tonight, I will also cut and try to re seal the fittings on the pump. If you noticed, the pump is also mounted upside down on the tank, I'm not sure if that would cause an issue or not.
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  #10  
Old 27-07-2012, 10:48 PM
Richard L Richard L is offline
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Default Re: Air in the lines

Do you have a filter between the tank and the pump?
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