Okay...this is probably 1,000th post of this, but we're TT Virgins.
Just picked up our new Rockwood RLT1905 and its fully winterized. In order to " de-winterized it, do I somehow need to flush out the gray and black tanks? I think I get how to flush and sterilize the fresh water system, Maybe!) but not sure if I need to do more than that.
Any help?