Bruce, I would cut a 6 inch marine access cover in the cabinetry under the sink before I drained the sink into the bilge. I have the same battery area you do and I had to install an in-line valve under the sink, (I had water in the sink when heeled over at hull speed). Your post has made me rethink it, thanks for that! I have ignored the valve location although I regularly lube and exercise the valve it could be a lot easier to access. It’s your boat but I like a clean dry bilge when possible and a mix of spit and toothpaste doesn’t do it for me. Len
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