Reun is correct, any solvent saying "potable water" is safe to use. As far as PVC glue, i use "christy red hot blue glue" and i do use primer only when needed, in other words when its a high water pressure line, and its only to be on the safe side, you shouldnt need to use on any plumbing for the tank. As far rubbing alchohol and medium grit sandpaper being used....waste of time. I know this glue Christy Red Hot Blue Blue is sold at Home Depot but be aware when useing this, it bonds very quicky and can be used with in mins. no need for a 24hr drying time.
Just a note, i am a plumber and i work with water all day long, no saleman for home depot and any other product. My time is money and wasted time is throwing money out the door and thats why i say " rubbing alchohol and medium grit sandpaper being used....wasted time." not here to upset anybody