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Old 09-29-2017, 12:48 PM   #3
Shrew
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City: Westerly, RI
Vessel Name: N/A
Vessel Model: 1999 Mainship 350 Trawler
Join Date: Jan 2014
Posts: 4,160
I would leave the Y valve in place. I don't like a through hull with a capped hose. I'd rather remove it and glass the hole back in. However, that is a cost to continue not using something you're already not using. Plus, down the road the next owner might want the option.

Leave it as is and turn the Y valve to holding tank. It will continue working exactly the way you want it to.
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