S/V Argo-Pacific Seacraft
Join Date: Oct 2007
Location: Baltimore, MD
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I also had the aluminum ones, they got pretty corroded, so I had them blasted, primed them with zinc aluminum primer then topcoated with the PacSea topside color paint (I think it's Eggshell, can check if you need to know).
That said, if you haven't got the new ones on yet, I would strongly recommend jettisoning the Vetus dorade boxes, they really don't perform that well and anything over a light rain ships water in the boat, not to mention actually taking waves. I'd recommend a properly engineered traditional dorade box and pipe system. Also, if you do put the Vetus boxes on, ensure that a) you don't put a steel vent lock ring on and b) that if you use aluminum or plastic rings slather a liberal amount of Anti-Seize (from NAPA Auto Parts) on the threads, they tend to lock up very easily.
Oh yeah, the plastic lock rings have a bad habit of snapping when the vent is subjected to a load, bumping into it, stays'l sheet fouling it, etc.
S/V ARGO - Pacific Seacraft 37 Hull No. 309