Axis Wakeboard Boat Forum

We got our boat used - 3rd season and now had so many bad experiences with boat yards, we've decided to learn and do what we can ourselves. There's a fitting on the transom that I guess is either an attachment for a shower or the winterization flush. It goes to a hose that runs along the transom inside wall from port to starboard but it's not connected to anywhere.

Be grateful if anyone knows what it is and where I should connect the pipe - I guess somewhere on the cooling system but I couldn't immediately see a port for it.

Thanks

That looks to be a flush attachment.