Sequence Dart for closed loop

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ronj

Blue Tang
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Nov 28, 2005
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Destin,Fl
i am going to order a Dart pump this week..i want to change out pumps on my closed loops..i have a Mag12 right now..it is very loud and gets on our nerves..the exchange will also add abot 2000gph of flow to my tank.!!!!!i am going to have to rebuild my entire CL..the pipes will be different sizes..hopefully i can get it all done this week..i am probably going to add a few more outlets to it as well
 

Krish

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Sounds great! I always wanted to try out a Sequence pump! Always heard greaat things about them...Make sure and post some pics when you get done:)
 

ronj

Blue Tang
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tangs are doing great...they will have some extra flow to fight against when i get this pump added!!!!! there will definately be some pics!!!
 

Haole

"Village Idiot"
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Phoenix, AZ
Cool I’ll just sit here in the back with some popcorn and wait for the pic’s. :D
 

twilliard

What next?
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Ellensburg, WA
I can tell you about that sequence. My wife bought me one for my closed loop.
Be prepared for some BIG pipe work.
Its quiet as can be and FLOWS all you can ever want.
 

WA coral

im watching you
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Aug 30, 2005
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puyallup
I also have the dart for all of the flow in my 240 I used 2- 1 1/2 intakes and 4 3/4 outlets and the flow was very strong and then I added locline splitters to all 4 outlets for a more even softer flow so eight streams on one pump not to mention I have it sitting almost 6 feet below out puts so 6 feet of head loss and it still pumps a ton and is quiet on top of all of that I was impressed
 

Scooterman

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Louisiana
You don't get vertical head loss on a CL but through restrictions etc yea.
I have the sequence 4200SW, slightly more gph for very little power difference, the dart has basically come from this pump. Like mentioned above, I have two 1 1/2" suctions that increase to 2" PVC to the pump suction, also a 2" BV, very big stuff! I just made a suction box that came out well, excluding that I should of made a better plan on the seams & wold of covered them using a wider front piece, it still works awesome!I also have 4 of the 3/4" outlets on each side of my MBV, each is split & reduces to 1/2" Loclines & the mid size flairs on each, flow is awesome, wouldn't change it, don't need PH's in my 125g tank. Pump is about dead silent, 6 months running continuously!
Wish I could say the same for the big Uno series for the return, LOL it is heard well, not for the living room I assure you.
 

NC2WA

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I never was good at plumbing, so can someone explain to me what why one would choose a Sequence pump over an Iwaki 70RLT ??

I am debating about getting either a sequence dart or iwaki 70 for my main return pump to tank/skimmer. it is going to be for a 315g tank.

thanks
kirk
 

twilliard

What next?
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Ellensburg, WA
Flow and pressure. I wanted a lot of flow and not a lot of pressure.
thats all I made my decision with.
3200GPH max on the sequence
ISnt the Iwaki a pressure pump? I think so, just look at the sequence input and output. You can tell its made for volume.

I guess it depends on what you use the sump for. I use it to skim, heat, and chill. SO I dont want a ton of volume through it. I want it to do its process.
I think the 70RLT would be a great pick for 300G tank.
I have a PCX-40 on a 120 and it still is a little fast to my sump. I plan on valving it down.
 

NC2WA

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Twillard,

Yes, you are correct. An Iwaki is a pressure pump rated around 1500gph. I am designing a CL for the tank with multiple pumps. Looking at Iwaki 40 RLT pumps right now.
 

shaywood

Member
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Dec 28, 2006
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Tualatin, OR
You can't go wrong with the Dart. I've been running one on my closed loop system for a year now. Runs 12 hours a day. Very quiet and dependable so far.
 

davidabrown66

Dolphin
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Jan 4, 2006
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150
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Kent, WA
Also use a Sequence pump for CL, but use the Barracuda with (2) 1 1/2" intakes, and split those out to 8 loc lines total. This pump is massive, like a sowing machine, but it's the best pump considering noise, flow, heat exchange, longevity and reliability. I've use Iwaki, Blueline pressure rated pumps, and they are great pumps if you need a pressure rated pump, but not needed here.
 

NC2WA

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David,

You say pressure rate pumps are not needed here. could you explain why and when a pressure rate pumps are needed??

thanks
kirk
 

davidabrown66

Dolphin
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Jan 4, 2006
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150
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Kent, WA
David,

You say pressure rate pumps are not needed here. could you explain why and when a pressure rate pumps are needed??

thanks
kirk
Hey Kirk,

Pressure rated pumps are designed for applications that have back pressure like protein skimming. This is a closed loop design where there isn't any back pressure or flow resistance against the oncoming force of water.

Hope that helps. :)
 

ronj

Blue Tang
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Destin,Fl
i plan to have around 2-4 returns on each end of the tank..i will probably end up putting loc-line on the outputs...i thought about maybe putting 2 outlets in between my overflows..i have the Mega-flow system with two drains that are off-centered in the tank..i always need some flow in between those
 

ronj

Blue Tang
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Destin,Fl
i am thinking of using flex-pvc for part of my CL..is this a good or bad idea??? i need some thoughts on it
 

Krish

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I like flex...It allows you a bit more room for error when plumbing as with hard pvc, you have to be exact with lengths etc so that everything will line up. Also, in some cases I think it is better when making turns with the plumbing as you can make gradual bends with the flex rather than using elbows and 45's that can add friction in some cases. Just use the right flex pvc that can handle the pressure:)
 

ronj

Blue Tang
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Destin,Fl
i am thinking of using flex pvc from the pump up to the tank, and then from there on, i will hard-plumb it
 

Brenden

See Anemaknee
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Oct 20, 2005
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NC
Kirk I run 2 Iwaki 70's on my tank. I also run the big 11,500GPH amp master/Aqua Sea pump on the closed loop. I can assure you the amp master produces a fourth of the noise the Iwaki's do and it is doing 4 times the work.

Ron I used PVC for the ouput and made a mainifold out of PVC with barb fittings on it for all my outlets. The flex worked great going out to the tank.
 
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