Plumbing for dual overflow 120

[Dragonvale]

Interesting never seen a setup like that. Since you tee'd off the return pump I'd considered that and the amount of head needed to travel. Also what are you trying to accomplish with the amount of water being returned? Did you want that being a large source of your tank's turnover? I only ask that cause some individuals hate looking at power heads in their tank. Anyways, here are my thoughts. I'd go with a pump with over 1500 GPH minimum. With the Tee and head to be considered along with two loclines you would need atleast that amount. I really like the laguna max-flo's based on what you get for the price. Its very quiet but any return will do.

Here's my problem. Your only overflow piping that gravity feeds your sump is a 3/4 line with a 1 inch emergency. I'm going off my head but a 3/4 inch line gravity feed is only 500 GPH. So anything over that getting pumped into the tank will resort to your emergency 1 inch pvc. So basically if you have 1000 GPH getting pushed back into the tank. Your 3/4 can only handle 500 GPH so it will overflow resorting to the 1" for the excess water. Again look up gravity feed pvc diameters to get a real GPH. Sorry for so much written.

 

[woodnaquanut]

I just ran into this info. Might give you some ideas for a Herbie in a RR tank.

http://gmacreef.com/herbie-dual-overflows/

 

[frost0fractal]

I've been doing research on how to build an overflow that is silent and safe, and there is a thread somewhere here on reef central about a "bean animal overflow". That's the one I intend to use from now on.

 

[woodnaquanut]

I've been doing research on how to build an overflow that is silent and safe, and there is a thread somewhere here on reef central about a "bean animal overflow". That's the one I intend to use from now on.

I run the BA. Love it. Easy to adjust and quiet.

The big 'problem' with BA is it really doesn't work well with the typical RR, dual overflow tank. One OF with three holes and you are golden. Even better is the BA with a coast to coast OF. Great flow and great surface skimming. There's a couple of threads on RC about both. Should keep you reading for a few weeks!

 

[swk]

If my next tank is a custom built job, I would go beananimal all the way. That said, I'm entirely happy with my Herbie I'm running on my stock RR 75 gal tank.

 

[Reef707]

Interesting never seen a setup like that. Since you tee'd off the return pump I'd considered that and the amount of head needed to travel. Also what are you trying to accomplish with the amount of water being returned? Did you want that being a large source of your tank's turnover? I only ask that cause some individuals hate looking at power heads in their tank. Anyways, here are my thoughts. I'd go with a pump with over 1500 GPH minimum. With the Tee and head to be considered along with two loclines you would need atleast that amount. I really like the laguna max-flo's based on what you get for the price. Its very quiet but any return will do.

Here's my problem. Your only overflow piping that gravity feeds your sump is a 3/4 line with a 1 inch emergency. I'm going off my head but a 3/4 inch line gravity feed is only 500 GPH. So anything over that getting pumped into the tank will resort to your emergency 1 inch pvc. So basically if you have 1000 GPH getting pushed back into the tank. Your 3/4 can only handle 500 GPH so it will overflow resorting to the 1" for the excess water. Again look up gravity feed pvc diameters to get a real GPH. Sorry for so much written.

Well i just want the returns to work kinds the water is very slowly flowing out of the returns so im going to get a jebao dc9000 once i have the funds for it. And i have a some jebaos for flow. Dang i didn't know a 3/4" siphon only does 500gph though but i heard its bad having the 1" as siphon and 3/4" as emergency. Oh no worries gives me more information so thank you!

 

[swk]

Those aren't full siphon numbers, but gravity drains. A 3/4 pipe at full siphon can handle much more than 500 gph I would think

 

[Dragonvale]

Those aren't full siphon numbers, but gravity drains. A 3/4 pipe at full siphon can handle much more than 500 gph I would think

"I'm going off my head but a 3/4 inch line gravity feed is only 500 GPH."

Just googled it and found this. So 660 gph. So if you were to have both of the overflows working 1320 gph.

http://flexpvc.com/WaterFlowBasedOnPipeSize.shtml


I have the DC-6000 for my 125 but its still sitting in a box till I get motivation to plumb it in.

 

[swk]

I still don't think those are siphon flows though. According to beananimal a 1" pipe can handle over 1700 gph at full siphon. I can't imagine that a 3/4 pipe would result in that much of a drop

 

[Dragonvale]

I still don't think those are siphon flows though. According to beananimal a 1" pipe can handle over 1700 gph at full siphon. I can't imagine that a 3/4 pipe would result in that much of a drop

I'm just going by their gravity fed chart.

Here's two other links.

http://www.reefaquarium.com/2012/aquarium-plumbing-basics/

http://www.thereeftank.com/forums/f217/how-much-can-a-1-bulkhead-flow-129841.html

Did quick research and its based on drops.

"No you really can't, well it depends on the length of the drop actually. With a 24" drop, the best you can expect is ~1500 gph using a 1" bulkhead and 1.5" pipe. All 1" would drop down to around 1200 gph. With a 5 - 6 foot drop, yeah, 2000 gph + is doable. As designed, originally, this system tops out at ~1500 gph. This is based on a simplified application of Bernoulli's equation (lacking an accounting for the ACTUAL inside diameter of the oriface, (smaller than 1" w/sch80 being the worst) viscosity, ambient pressure, temperature, jupiter aligning with mars, and friction loss...the above numbers however do account for the friction loss, the results of the calculation is actually 1660 gph.)"

 

[swk]

Plumbing for dual overflow 120

Gotcha.

Op - I guess the bottom line is how much turnover you're looking to achieve through your sump. I think much more than 5x an hour is unnecessary especially when so much flow can be provided through wavemakers.

I know from experience that I ran a wide open mag 18 with 1" pipe through a single full siphon drain in one of my 6' cichlid systems. All with room to spare on the gate valve. I know there was head loss with the pump, but it's still an impressive amount of flow nonetheless compared to durso, or comparable systems

 

[Dragonvale]

Gotcha.

Op - I guess the bottom line is how much turnover you're looking to achieve through your sump. I think much more than 5x an hour is unnecessary especially when so much flow can be provided through wavemakers. I

I'm wrong LOL Standpipe height is irrevelant LOL Read the thread to make out the truth and tell me what it is. LOL

http://www.reefcentral.com/forums/showthread.php?t=2376550

For me, I just want slow flow through my sump. All the turnover in the tank is done via powerheads. Got a headache reading through all of that. ha ha ha

 

[swk]

Personally, I find about 3x turnover to be plenty. The only exception for me is when a sump is the sole filtration method in a FW tank. Slow turnover makes mechanical filtration suffer and hell, I don't even use any mechanical media in my reef tank lol

 

[woodnaquanut]

I still don't think those are siphon flows though. According to beananimal a 1" pipe can handle over 1700 gph at full siphon. I can't imagine that a 3/4 pipe would result in that much of a drop

Since pies are squared

If the ID is actually 3/4" it has an area of 0.4416 sq in
If the ID is actually 1" it has an area of 0.785 sq in

So a 1" pipe is almost twice the cross section of a 3/4" pipe. Given flow is constricted in a 3/4" pipe, I think those numbers aren't too far off.

Now I have to actually get up from my computer and measure real pipe. Given the strange dimensions of pipe, I'm guessing neither is actually the size listed.

 

[woodnaquanut]

My edit time expired so nuther post!

Pipe I have measured .82" and 1.03" so actual area is
0.53 sq in for 3/4" pipe and
0.82 sq in for 1" pipe.