120gal return pump question

[dylanst.onge]

So I have a 120gal dual corner overflow with megaflow overflow kit with dual exit returns. I am currently running a jebao 18000 at almost 80% doesnt seem to feel like much flow is coming out of the returns. Pump is in sump under the tank and runs into a manifold that runs 1 small reactor with all 3/4 pipe. Trying to figure out if the pump in not working correctly as a buddy of mine runs same pump and pumps it out of his basement with a lot more flow on 2 80gal single returns at only 50% is anyone else here running a jebao 18000 pump on a dual overflow 120 or something close? Thanks in advance

 

[Reeferdood]

So I have a 120gal dual corner overflow with megaflow overflow kit with dual exit returns. I am currently running a jebao 18000 at almost 80% doesnt seem to feel like much flow is coming out of the returns. Pump is in sump under the tank and runs into a manifold that runs 1 small reactor with all 3/4 pipe. Trying to figure out if the pump in not working correctly as a buddy of mine runs same pump and pumps it out of his basement with a lot more flow on 2 80gal single returns at only 50% is anyone else here running a jebao 18000 pump on a dual overflow 120 or something close? Thanks in advance

I would bet if you upgraded your plumbing to a larger diameter you will see more flow.
3/4 PVC is very restrictive IMHO, and it gets worse the more fittings you add to it.