PVC size for equipment pad?

[Myburneraccount]

I have 2.5" on the suction side and 2.0 on the return side.

Question is what size pipe should be used at the equipment pad between pump, filter and heater?

Jandy epump VS 2.7hp
Jandy JXi 400 versaflow
Jandy filter CL460

 

[AQUA~HOLICS]

2.0”

 

[Myburneraccount]

2.0”

Thank you!