What size pump?

[SpencerT82]

I’m looking at getting the pax pax bellum n18 and it says flow rate should be 150-200 gph. I estimate the head height to be about 2.5 feet. Should I go with a 185 gph pump or 251 gph?

 

[ZombieEngineer]

Head height will cancel out since head is calculated inlet of pump to outlet of reactor.

The head loss will all be minor losses from tubing.

If you are looking at Sicce, these appear to be adjustable from about 150-200 gph anyway with minimal tubing. I would lean that direction probably.