Pump head pressure?

[moseley75]

I understand that you want 7 to 10 times the volume of your system as your flow rate.
Is that at the outlet of your return or just the pump rating?
I have to lift the water abt 4' straight up. It's going to have an offset so a couple.of 45 bends and 2 90 bends at the outlet. All of which will add head pressure and reduce the flow at the outlet.
Also an unrelated question. Can I use a thin piece of memory foam as a tank leveling pad?

 

[Flippers4pups]

This is will help: http://www.reefcentral.com/index.php/head-loss-calculator


I shoot for 3x-5x the DT tank volume to the sump. The rest is 10x water volume of the DT with wave makers or
power heads.

You should level the stand, not the tank. Wooden shims or composite shims under the stand only till level.

 

[moseley75]

With a durso drain will the pump control the overflow.or should.i put a gate valve in the drain. I can adjust the flow on the pump if it is too much.

 

[Flippers4pups]

Having a little excess flow can be good. It can allow for running off a manifold: reactors, ATS, UV........

So no, don't restrict the drains with a valve as it could get clogged and cause a flood in the DT.

Waste off the excess pressure to a manifold if you have the room. When not running reactors...etc. run the excess back into the sump. Adjusting the manifold with a ball valve will adjust the flow to the DT. Works very well.

Here's mine,

 

[moseley75]

Not enough room. My stand is only 18 x 17 x 24 inside. I'm using a cube nano sump by Eshoppes b/c of limited space. Every thing will have to be small. I want to use a Apex Jr or RKL to control it all. I may have some electronics hanging on exterior of stand.

 

[mcarroll]

No obstructions on a gravity drain, please.

Ideally, you want it free-running AND SILENT.

That means keeping it down to 2x-4x flow or thereabouts, as @Flippers4pups indicated. (Sometimes even 5x is noisy, so 2x-4x is ususally what I say....if 5x works, there's nothing really wrong with it. Going bigger just to go bigger only gets you more expensive pumps that use more electricity in the absolute best case. 2x-4x can sound kinda low, but even 2x would work fine in most cases.

 

[moseley75]

Ok. So I've been looking at piping my sump and decided to try and create a manifold of sorts. I plan to run 3/4 pipe from the pump outlet to the DT. I am going to put three 3/4 x 1/2 tees in line for reactors (I like the BRS) and such and a return to the sump. I'll valve 2 of the 1/2 lines for future and the third back to the sump. The Sicce Syncra 2.5 would be perfect but they only make it in 220/50 so I'll have to make do w/ either the 2.0 or the 3.0. The 3.0 is rated at 714 gph all the head calculators show 4.9 ft head loss which is still over 500 gph. How much does the throttle controller actually reduce the flow?