The 15 already has a drain up by the bridge deck, I believe. ONe drain in the cockpit sole is ok. If you want to add another lead it aft through the stern and above the waterline. The stock drain will handle "normal" water. The abnormal down pour or a following sea broach will need a much larger drain and at that point the drain led aft through the transom above the waterline will serve well immediately ( 1.5-2" diameter) to drain the cockpit until the sole drain can complete the drainage. I added two 1.5 inch drains to my M17 and ran them 5" above the cockpit sole and straight out through the transom. Capping off the ends in the transom with flapper valves makes them one way until needed by a full cockpit. Pictures available of my work on the MSOG photosite under boat name "AS-IS" On Fri, Dec 25, 2020 at 6:32 PM Jim Sadler <jimsadler@jascopacific.com> wrote:
Any of you skipper added cockpit drains? What is the best way? The stern or thru haul? Merry Christmas Capt Jim
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