winterizing question for year 2000 20i 5.7 L

[cbabcock]

I bought an older tige 2000 20i and am in the process of winterizing it.
I would like to add a shut off to the lake water intake and add a T off for city water to run when in dry dock and also to use for winterizing and circulating plumbing antifreeze through the cooling system.
Has any body done this before and is there a simple kit that can be bought and installed?

[Ruger761]

There are a few companies that make kits. Perko Flush valve is one. The problem is the supply hose from your thru hull to the sea water pump is very short and I dont think you will beable to get the valve inline.