What size pvc to use for a manifold

[Calireefer92]

Wanna build a manifold for my Red Sea 425 what size pvc do I use because I see people using 1” and 3/4”. I guess I need some advice and help on how to build this what would you guys use to build a manifold?

 

[Anirban]

You can ask here for a faster and accurate response...
https://www.reef2reef.com/threads/show-off-and-discuss-your-red-sea-reefer-series.219309/