Plumbing question

[chrisd]

Ok I need help. I'm going to be adding a sump and I need help on what plumbing I need to buy. I've already done a search of old posts and I'm keeping the plumbing very basic. Basically it's going to be a hangon overflow with a 1" drain. I was going to have 1" PVC pipe> ball valve> PVC> 45 elbow> draining into the sump. On the return to the display side it'll be a pressure rated pump with a 3/4" return. I was going to do flex tube> PVC> ball valve>PVC >4x 90 elbows> PVC drilled with holes for a vertical spraybar located in the back corner of my 54 gallon corner tank. Now I was wondering if I should leave my return line at 3/4" hose and tubing or make it 1"? Also, how do I connect all of the PVC, hose and valves together?....Is there an insert that goes between them and is glued? I'm not sure if that is what a slip is? Also what glue shoud I use that's aquarium safe? I hope I explained this clearly enough and apoligize for my ignorance but I don't have a clue about plumbing and can't seem to find any clear answers in the old posts. Thanks for any advice.

Chris