Nauta holding tank fill fitting as vent? - SailNet Community

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Old 03-22-2010
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Nauta holding tank fill fitting as vent?

Looking at the Nauta site I see their vent fitting for the holding tank bladder is for a 5/8" hose. However, the fill fittings are for 1.5" hose. Why couldn't I use another fill fitting as a vent fitting, and get better airflow? Most of the articles I've read suggested 1" lines, so wouldn't slightly larger be better than smaller?
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You need to attach your vent hose to something at the other end, like a thru-hull just under the toerail. Most of the purpose made vents accept 5/8"+/- hose. I installed two 5/8" vent hoses to two thru-hull vents. Seems to work well (4-5 years).
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Old 03-22-2010
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So you installed two of the standard Nauta 5/8" vent fittings on your holding tank bladder and ran them to through-hull fittings. Did you use plastic through-hulls or metal?
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