I had a massive tank and solar panel contraption on the roof when I lived in Turkey in August it regularly blew off steam like geezer from a plastic vent pipe .
On my return from visiting here for a month a neighbor said he had seen a big mouse he meant a rat enter my roof space an sure enough he was right it had gnawed though the pipe and flooded the room below with everything now having a green fury beard .
So I would advise mounting the tank at ground level or in my case forgetting it altogether ????