Need help plumbing Eshopps Eclipse S overflow

[AdamNC]

So after 10+ years in the saltwater world I'm attempting a sump build. All my other tanks have always had HOB equipment. Already have the 40 breeder tank, Sicce Syncra 2.0 return pump, Eshopps Eclipse S overflow and Somatic 60S sump but I'm having a hard time figuring out what plumbing I need and more importantly, what size pipes and fittings and the types. Slip fitting, threaded fittings, silicone return tubes, ball valves, gate valves, man my head is spinning. Basically I know I need 2 lines from the overflow to the sump, 1 on a valve and the other opened up for emergency and 1 return back to the tank.

tl:dr What size pvc do I need for the overflow and return. 1" or 1 1/2" overflow and 3/4" return to the tank?

 

[ca1ore]

The Eschopps S overflow is native dual 1" bulkheads. I used 1" PVC for the emergency/stand pipe and went down to 3/4" PVC for the siphon. I now use flex PVC exclusively in my drains and returns - mostly means I don't have to futz with elbows and 45s. Ideally you'd want to use a gate valve on the siphon, though a ball valve can be made to work in a pinch.

 

[AdamNC]

Is the pvc just jammed up to the bottom, glued in and then place a union a few inches down? Cause I measured it and it seems close to 1 1/2” on the inside, but has threading on the outside. All I’ve seen in pics is the pipe jammed in there but no union attached to the overflow itself.

 

[ca1ore]

The bulkheads that came with mine were slip; so, yes, you solvent weld the 1" PVC into the bulkhead.