manifold ?

nay,kid · 01-04-2008, 07:43 PM

I'm building a return manifold on my 4'x2' 150g. my return pump is a sequence barracuda with a 1"1/2 supply line. I was going to build the manifold out of 1"1/2 and reduce to 3/4 locline. theres not much room for this inside my hood so can I build the manifold out of 3/4 or will this be to restrictive? I already have 2 1" bulkheads in the back of the tank with double 3/4 locline returns.any thoughts would be greatly appreciated thanks.

poppin_fresh · 01-04-2008, 08:26 PM

Is this a closed loop or a true return?

You might want to run all the plumbing into this calculator and it will tell you the GPH per outlet

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veriann · 01-04-2008, 09:07 PM

Ive been hanging around cars to long i think. manifolds or plenum i think car components first.

Are you leaving the 2 main returns, but tapping of the return line & making this plenum run along the back as well?

nay,kid · 01-04-2008, 09:23 PM

this is a true return. the return line will come off the pump go up 14 feet then into a double y the two sides of the Y will go to the 3/4 bulkheads in the back of the tank. the center of the Y will go up on top to a manifold with 4 3/4" loclines. the plumbing calculator asks for pipe diameter which will be 1 1/5" going up, but reduce to the 3/4 loclines. if you put in 1 1/2 it comes out 1387 GPH with 3/4 it comes out 440 GPH. I'm a little confused to say the least. I'm trying to not use power heads or at least reduce the amount of them since my pump is so big.

poppin_fresh · 01-04-2008, 09:39 PM

How big is your sump? If its not a biggun' (sounds like a basement set up) trying to run 1300 gph though it will cause issues. Microbubbles, poor filtration and NOISEY overflows are only a few.

nay,kid · 01-04-2008, 11:56 PM

its a 100 gallon rubbermaid also I'll be feeding a 55g fuge with the return line.

**thesaent14** · 01-05-2008, 12:03 AM

i am using the same pump here my frag room

i recomend you to use ball valves to control the flow that pump is really good

nay,kid · 01-06-2008, 10:30 PM

this is what Ive done so far nothings glued yet. still have a few more parts to get, so that means my nine thousandth
trip to home depot this week.

**thesaent14** · 01-06-2008, 10:35 PM

nice work really clean

**Phurst** · 01-06-2008, 10:38 PM

Yeah, that really looks great. I think that will work well. Are you going to install ball valves anywhere after the 3 way to fine tune it?

nay,kid · 01-06-2008, 10:38 PM

thanks the flex line will get ziptied to the stand so that will help straighten it out. and there will be locline where you see the black ends.

nay,kid · 01-06-2008, 10:40 PM

I was thinking of putting valves on each locline but those things are quite expensive

veriann · 01-07-2008, 01:24 AM

Talk to me about this please bud

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From what i can see on this side your using this coast to coast for overflow duties?
I see what looks like a cut out section on the right side, is this your only overflow access point?

This we have to work out your rough through-put as you have two different spectrum vaules going there.

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14ft x 1 & 1/5th

2 x 2ft & 3/4 inch for your 2 primary returns on each side. Primary because of less headloss compared to your spray bar returns....(is the plumbing wider with a reducer at the bulkheads?)

another what...3ft for the modular tubing over the top at 3/4 inch.?

Im going to have to work it into metric at some stage cause i have know idea on your guppy measurements. If your top sections total pipe dimensions equates to the diameter before the reducers, then the only factor is straight headloss & you have a ball park vaule. If it doesn't we're going to have to venture further into the equations to negate your 2 values divided by the hight. Im sure we have wizz kids on the site, if not i'll calculated it for you tommorow.

nay,kid · 01-07-2008, 11:19 PM

I'm a little confused on what your asking. the plumbing off the pump is 1.5 inches then reduces to 1" then to 3/4 loclines. the overflow has 4 1" drains. I'm not sure what you mean by cutout.the pump will be 14 feet below the top of the tank (in the basement) its a 3600 GPH barracuda thats rated for 2200 GPH at 14".

nay,kid · 01-07-2008, 11:24 PM

yes the pipe reduces from 1" to 3/4 at the bulkhead.the modular tubing will be about 30" it will be 1.5" all the way up till the Y.

veriann · 01-08-2008, 06:23 AM

well i crunched the numbers in a calc for you based on what i can see & some info you provided - would like a comparison from someone in the trade though., maybe Ampage can assist here as well.

Ft/loss head pressure = 18.44
psi head pressure = 7.97
gph = 1032.06
ft /sec exit velocity per exit = 0.61

hope that helps.

nay,kid · 01-08-2008, 10:04 PM

Wow thanks V, that helps allot. that sounds like good flow to me, hopefully I can have no powerheads or at least just one.

veriann · 01-09-2008, 03:39 AM

no probs, still send a PM to ampage to double check my calc, im rusty, but he's rustier if you know what i mean..lol

Im worried theres not enough access points for your coast to coast. All ive seen of it is on the right hand side - you have enough weir space & compound that with your 4 over flow dump pipes so your good there. Post a pic of the entire thing please, front side.

It might be me, but currently 2 things are screaming at me, loud as %#$% as it belooows through those small side overflows, or pump starve in your sump.