The fear of PLUMBING

[seasmurf]

I need help. I am soon to plumb my 180 to my basement sump. First though is that it's going to a frag tank. I can't go wrong with this because I RENT.

My overflow has one 1.5" drain out. And there is a same sized return, again, just one hole (1.5). I am priv to flexable PVC.

Would like opinions and advice on plumbing do's and dont's. Pro's and con's...

I know that the fittings to these particular bulkheads are required to fit inside, and I really don't know what I'm talking about, so ... help? Please? With sugar on top?
Thank you in advance.