What do you think of my plumbing diagram?

[Anonymous]

Is there anything missing?

What size Iwaki oump for the closed loop?

I may convert the sump return to a SeaSwirl as well in the future.
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[Reefscap]

I like the idea for the CL intake
As far as the CL pump I think the 3/4 SS can handle 850GPH, so look at your head height and 90s and give it at least that.

 

[King Jason]

What are all the Ball Valves for?

 

[Anonymous]

Looks great!

I am not sure you need the valve on the line from the overflow to the sump. If the pump is off, no water will be comming through it, and it the pump is on you don't want that valve to be closed or you overflow the tank. Am I nuts?

I would also use a compression fitting on the standpipe part of the Durso. It allows for easy height adjustments of the Durso. They are one of the coolest things around.

RR

 

[Bill2]

Why have the ball valve on the overflow? To stop the water going down it turn off your return pump.

 

[SPC]

It looks to me like you are going to have a micro bubbles being returned to the tank problem Rob. Those baffles will do no good if you have one of the pumps located under the overflow.
Steve

 

[liquid]

As others have mentioned, you really don't need that ballvalve on the input side of your pump. Unless of course you are using that ballvalve so that you can service your pump without breaking the siphon.

The question that no-one has asked you yet is what GPH are you shooting for in your 46 gal tank? Is it a SPS dominated tank or soft corals? SPS dominated tanks typically are higher flow.

Shane

 

[Anonymous]

This is for my new setup. It will become a SPS/CLAM/LPS tank in the near future. I will be moving all of the contents from my 46 to it for now. I will be fragging all of the leathers and selling them off.

The reason for the babll valve on the overflow is just for maintenance. I might need it just though it couldn't hurt.

As for the bubble, the mag12 under the overflow is just for the skimmer. The mag9 is for the tank return.

The overslow will come strightdown into 2 45's then into the sump. Hopefully this will cut down on the noise as well.

What does this adjustible compresion fitting look like? Who's got them? Does it look like a big coupling with nuts on each end for exending pipes? I think I know what you are talking about and that is a great idea.

Thanks.

I will be starting this plumbing this weekend hopefully if I get the pumps.
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[liquid]

The specs for the 3/4" SeaSwirl model are such that you should not put more than 850 gph thru the unit.

I will assume the following:

Desired output: 850 gph
PVC pipe Nominal Diameter: 0.75 inches
Pipe Length: 8 ft
# of Ball Valves: 2
# of 90° Elbows: 4
# of Couplings/Unions: 2
Static Head: 0 ft (since it's a closed loop)

Under these conditions the following pumps should give you approx 850 gph flow from a 3/4" sea-swirl:

Mag12:
Flow Rate (GPM) 13.81
System Flow Rate (GPH) 828
Velocity at Output (ft/sec) 8.30

RIO 4100:
Flow Rate (GPM) 14.18
System Flow Rate (GPH) 851
Velocity at Output (ft/sec) 8.52

Iwaki 30 RXT:
Flow Rate (GPM) 13.24
System Flow Rate (GPH) 795
Velocity at Output (ft/sec) 7.96

Iwaki 40 RXT (gate-valve this one back a bit):
Flow Rate (GPM) 15.47
System Flow Rate (GPH) 928
Velocity at Output (ft/sec) 9.30

Gorman-Rupp Industries 518 (gate-valve this one back a bit):
Flow Rate (GPM) 15.85
System Flow Rate (GPH) 951
Velocity at Output (ft/sec) 9.53

Little Giant 3 MDQX-SC:
Flow Rate (GPM) 13.47
System Flow Rate (GPH) 808
Velocity at Output (ft/sec) 8.09

Little Giant 4 MDQX-SC:
Flow Rate (GPM) 14.93
System Flow Rate (GPH) 896
Velocity at Output (ft/sec) 8.97

Little Giant 4 MDQ-SC:
Flow Rate (GPM) 12.55
System Flow Rate (GPH) 753
Velocity at Output (ft/sec) 7.54

GenX/Mak4 (gate-valve this back):
Flow Rate (GPM) 15.37
System Flow Rate (GPH) 922
Velocity at Output (ft/sec) 9.24

Velocity T3:
Flow Rate (GPM) 11.98
System Flow Rate (GPH) 719
Velocity at Output (ft/sec) 7.20

The big thing to take away from this are:

* There's multiple pumps that will acheive this flow so check the manufacturer's specs to find the most efficient one for your application. More on this in about a week.

* @ ~850 gph you have a pretty high velocity at output -- anywhere from 7 to 9 ft/sec. Depending on the critters you want to keep, this may be quite a bit more flow than you need. You can always gate valve back the flow to slow it down if need be.

hth

Shane

 

[SPC]

Posted by Rob:

As for the bubble, the mag12 under the overflow is just for the skimmer. The mag9 is for the tank return

Steve

 

[Anonymous]

The reason for the babll valve on the overflow is just for maintenance. I might need it just though it couldn't hurt.

Actually it could. The one time you close it and forget to open it before turing on the return pump you will get lots of water on your floor. The laws of reefing say that this will happen, not if. This is the main reason I did not put in valves on my overflows.

What does this adjustible compresion fitting look like? Who's got them? Does it look like a big coupling with nuts on each end for exending pipes? I think I know what you are talking about and that is a great idea.

You can get them at hardware stores. They are slip fit and look like the big thing in the bottom/middle of the stand pipe in the pic below. The big part stays fixed, and the smaller pipe at the top of the big part can slide up and down.

RR

 

[Anonymous]

Gotcha. No ball valve on the overflow.

Thats what I thought the compresion fittin was. I will get one tomorrow.

Thanks
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