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-   -   Help, noisy CPR overflow (http://www.plantedtank.net/forums/showthread.php?t=223658)

HD Blazingwolf 01-24-2013 11:51 AM

Help, noisy CPR overflow
 
on my 29 gallon i have the cs 50/500 setup and flow rates betwen 175- 334 gph are almost dead silent, just a slight water trickle noise.i used couplers and adapters to get from 3/4 strainer to 1 inch vinyl tubing.

on the cs 90 overflow i tried to use as few connectors and just went with 1 inch barbs to 1 inch vinyl tubing, my pump is capable of doing less than 600 gph or up too 800 gph at my head pressure.. i've been adjusting and adjusting my flow rates and i either get tooo much and the overflow fills more than halfway up and is splashing everywhere and my tank is a tornado,
or i turn it down and the level sinks to a little less than halfway up the strainer and i can see air being sucked in from the top three strainer cutouts.. silencing tube does nothing.. as a temporary fix i've taped the top three rungs of the strainer and it is now nice and quite
is there a safer more perminant fix?
is my issue due to not using 1/1-4 inch tubing? or is there something else im missing, the drain hose is a nice even curve all the way to the sump. no drainage issues there, its a smooth flow right into the sump, flow dynamics are similar to my other cpr setup that is quite
What am i missing??

UDGags 01-25-2013 02:45 AM

Hmm...could you use an elbow and connect the strainer at a 90 angle so its lower than the water line (like the top 3 taped off would be lower)?

Would it work to T/WYE off and make a herbie? I have the CS202 so not sure on the one hole system.

Or remove the strainer altogether and put a sponge at the bottom

mrkookm 01-25-2013 03:15 AM

Back in the day I had a CS150 on my tank and I had similar issues like yours. Look up 'Durso standpipe', that will help with quieting things down.

HD Blazingwolf 01-25-2013 10:01 AM

Ill look into modification only after determining this rig cannont be silent.. as for right now, with tape on the strainer its fine.. i even added some pvc at the bottom to raise the water level for less splashing.. we shall see.. im almost wondering if i need to step up my pipe size

UDGags 01-25-2013 01:06 PM

I don't have a strainer on my overflow pipes. I just cut a PVC pipe(s) to the size I wanted and left them open. I do have S.S. mesh on the tank side of the overflow though.

HD Blazingwolf 01-25-2013 02:22 PM

REALLY??? how does that not drive u insane!!!!

NWA-Planted 01-25-2013 02:26 PM

Re: Help, noisy CPR overflow
 
I am not super familiar with that overflow, does it have one or two drain pipes?

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UDGags 01-25-2013 02:44 PM

Quote:

Originally Posted by HD Blazingwolf (Post 2345818)
REALLY??? how does that not drive u insane!!!!

I have the CPR202 so it's setup as a Herbie.

HD Blazingwolf 01-25-2013 05:03 PM

oh that makes sense... i know about herbie and durso

nwa it has one drain.. lemme grab a google image until i can snap some tonight
http://aquatic-empires.com/image/cac...ox-500x500.jpg

that shot is of a cs50.. smaller back side.. also the newer style does not have the fish screen. it has a slotted weir

NWA-Planted 01-25-2013 05:14 PM

Re: Help, noisy CPR overflow
 
I know you won't like it but here is my recommendation. On my old setup it had two drains, i ran one at a full siphon just to where a little bit went into the other pipe. Worked great, super quiet and still got the air exchange via the second pipe.

I would add a second bulkhead on one side of the housing as a "overflow" run the primary drain at full siphon but slow enough that water still travels through the secondary line. That way you have a backup drain quiet and air exchange

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Kathyy 01-25-2013 05:23 PM

Try the Durso first. it is much better than nothing is super cheap and not permanent. I do love the Herbie though.

Living on the edge blocking the overflow........

HD Blazingwolf 01-25-2013 05:45 PM

Quote:

Originally Posted by Kathyy (Post 2347378)
Try the Durso first. it is much better than nothing is super cheap and not permanent. I do love the Herbie though.

Living on the edge blocking the overflow........


YEAH I KNOW.. i dont wanna keep it that way.. that's why i was looking for an alternative before changing things

the cs50 was just sooooo quite.. i was hoping i would have similar results but alas. its either vortex tank or gurgle noise with this model
so durso it is!!
and if that doesn't work, i'll be looking into a herbie

n00dl3 01-25-2013 05:56 PM

I use Hofer Gurgle Buster in my overflow box. It is pretty straight forward to build. It works great for me. Here is a link of the build:
http://home.everestkc.net/jrobertson...struction.html

I got a couple pictures in my 180g journal.

NWA-Planted 01-25-2013 05:59 PM

Re: Help, noisy CPR overflow
 
Lol so i have been recommending the herbie style this whole time...

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HD Blazingwolf 01-25-2013 07:18 PM

Quote:

Originally Posted by NWA-Planted (Post 2347722)
Lol so i have been recommending the herbie style this whole time...

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yup
:proud:


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