Quote Originally Posted by Raylsv View Post
Is there a restrainer i need to unscrew like in the video above?
On the new boats there is a strainer between the valve on the hose that goes to the water pump. On some older boats, peeps have installed them for flush-out, starting w/o being in the lake, or anti-freeze.

On the old manifold system there was a strainer to keep debris out of those sprinkler values. If you do not have the manifold system, they probably removed the strainer.

The only way of knowing is to follow the hoses from the 3-4 valves in bilge. They will probably lead you to a ballast bag or the water pump assembly