The drain plugs in my skis are all connected to the bilge system. they are not a direct drain plug to drain water from the ski. When my bilge is filled with water from washing, opening the drain plug does not let the water out.

Can I add a conventional drain plug? Or can I convert these drain plugs to be conventional?

I have a 2012 Seadoo GTI 155 and a 2019 GTI 130