Got the 300! Filtration ideas needed!

[aldiaz33]

making the returns larger is going to slow down your flow rate. I would stick with the 1" returns but make the drains 2".

I thought this as well (it made logical sense to me at the time that having more water weight for the pump to push due to the larger pipe would decrease flow), but someone recently called me out on this. It's counterintuitive, but a larger return will give you more flow because there will be less friction within the pipe, all else being equal. The static pressure at any pump discharge is going to be the same whether there is one 1" return pipe or ten 10" return pipes, all else being equal.

Check out this link and scroll bout 2/3 of the way down to see the formula:

http://www.pumpfundamentals.com/tutorial3.htm

 

[Steveo McNello]

Aldi thats sort of what I was thinking. I took hydraulics for my fire academy, and with applying some knowledge I figured water has to go where its pushed. You cant condense it. Also your point of increasing pipe diameter does reduce friction loss. Regardless of return diameter the same amount of waters going to come back. It may not be balanced between all 4 lines though. but with what josh is saying, there may be some stagnance in the end lines. my returns are below the water line so if the drain potential exceeds the pump potential the lines furthest from the pump on each end will just sit full of water. your comment was my initial hypothesis. Anybody follow what im trying to say? Lol. But in the end, 4-1" returns sounds good.

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[scott m]

Maybe I missed this, but what's the water turnover rate are you looking to accomplish? If you know that, designing is easier. By using the same pump and increasing the size of the return lines, you basically just decrease the velocity of water returning to the tank. If you're looking for a balanced flow through each return line, put a valve on each line and then do fine tuning adjustments.

 

[tazjack]

Steve you are one sharp cookie! I thought back on transport phenomena then quit lol i started mixing up my sciences...i couldnt remember is Pin was equal to Pout and if P was constant over distance and if there are 4 outs is Pout=Pin/4 yada...yada...yada You guys are right. Theres pressure, velocity, and flow (through the tank and within the tank) pressure may be the same but the velocity would vary with pvc diameter as scott mentioned...right? Uh oh...here comes confusion again lol i think u have some pretty good feedback steve. Let me know what u decide

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[Steveo McNello]

Manifold to be : )

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[scott m]

.....

 

[Steveo McNello]

John came out again today and shes running! Tom from aquascape came by a few days ago and opened up my.drains, and together the 3 of us made this. Now for the sump lid, power on the heat, and fish!

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[rob1984]

You take the bottom drawer out of the tower ? Or how ya have the tower all setup !! Thinking of setting up a 110g stock tank like this for a sump on my tank

 

[Steveo McNello]

Took the drawers out because the garbage can is a lot neater for my new found flow. Filter sock secured in the lid, and bio balls down the whole thing. Heres a different angle.

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[Steveo McNello]

Mom likes the pots haha. Ill leave them in there til my fish get big. Its the least I can do for her allowing the 300 haha!

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