Thinking about doing a 10g fug/sump for RSM

Instead of the fuge I am using a AAT denitrate coil that is working flawlessly. I have a 3 port manifold for mine. A maxi 1200 pumps water to the manifold, from there it splits off to a possible of three ports. At the moment one gate valve goes to the chiller then to the p04 reactor then returns back to the tank. Another gate valve goes to the Denitrate coil (1/4in tubing) and then returns back to the tank. And the other one is going to go to a cal reactor when I get it. Works like a charm. Just need to make it nicer.

 

Alright, so I bought my PVC pipe, different angle joints (and I think I got all of the ones I need), and 3 ball valves. All I need now is a check valve, because Home Depot only had metal spring check valves, which isn't what I want. What would I use to join the PVC together, normal PVC glue? Or is there something special for aquariums? I think this sort of information is what I need before I can get started putting it all together.

 

I used regular pvc glue and purple primer. After several months, everything is still alive and well.