Sanitize/winterize port

[Skillet173]

Apologies for my seemingly dumb inquiry.
On my 419 I have a winterize port in wet bay. I believe I am mistaken that this port will operate under the suction of the pump and draw in antifreeze/ sanitizing solution?
Assuming above is correct what pump do the “guru’s of all things RV” here recommend to get fluids into tank, and lines?
I’m in need of a tank and line sanitizing and May as we’ll be ready for end of season winterize.

Thanks in advance!
Charlie

[flybouy]

The pump is the fresh water pump. The handle you flip to sanitize or winterize just diverts the pumps intake from the tank to that hose connection. When winterizing a short hose is attached and inserted into the gallon jug of solution.

[Skillet173]

Thank you. That’s what I was hoping.