Need help sizing a pump.

[DBLA]

So I need help figuring out the appropriate size(flow) pump for a little different situation.
I will be running the pump from inside the back of a 65gal JBL AIO up 20”, U turn down behind tank to a Pentair 25W UVS. Then 28” up the 3” ID UV sterilizer then another 36” or so to return to tank.

I plan on utilizing the UV S for clarity so need about a 400gph to get a 7-8x turnover per hour.

I’m hung up on the the rise (fall - gravity) then rise again in a substantially larger plumbing. Dose the head pressure just add the rise?

does running 3/4” hose over 1/2” help?
TIA
Aaron

 

[blaxsun]

Sicce SDC 6.0 pump. DC, should be able to run it at less than 60% to achieve the desired flow rate.

 

[Projects with Sam]

I thought the rise and run that are in pipe cancel out so you only need to calculate total height for the overall change but I'm just guessing.

 

[DBLA]

I thought the rise and run that are in pipe cancel out so you only need to calculate total height for the overall change but I'm just guessing.

This is what I was struggling with

 

[DBLA]

Sicce SDC 6.0 pump. DC, should be able to run it at less than 60% to achieve the desired flow rate.

I run a Sicce SDC 3.0 as my main return pump, I’m worried the 6.0 may be too big for the rear chamber I’ll have to take some measurements.

 

[DCR]

Yes the rise and fall cancel each other out. You are largely just dealing with frictional losses.