My Tige 22v didn't have a Sea Strainer and I've been hearing so many great things about the Indmar Sea Strainer with Flush Connector for ease of winterization. They run about $105 and I ordered one on Black Friday at a discount without much though that it would be an involve install.
I've been trying to trouble shoot some electrical stuff so I figured I may as well install it so I can run the boat on a hose. I quickly realized that my boat also doesn't have a seacock that is required to use the flush connector and I had very little room to do the install of the Sea Strainer.
The inlet of the Sea Strainer is 90 degrees to the flow and made it even more difficult to find room to install in the tight space. I wish they offered it in an inline configuration. I was able to fit it in by moving a ballast pump and a 90 degree fitting with very little hose between fittings.
As for a seacock I found a piece of rubber roofing cut to fit in between halves of the Sea Strainer works well to stop the flow of water out the inlet so you can run on a hose.