Re: sink drain ?
Those hull drains are EASY to replace, these boats are on a trailer right? I replaced mine & built up the inside pad cause the wood was all rotten when I got the boat. I have the thru hull still there but the valve is removed & the fitting is just capped off. When NA changed locations from the companionway to the strbd berth for the sink they didn't change the location of the fitting is my guess.