overflow box drainage noise.

[DancinBumbleBee]

There was a Durso on the first Overflow I used, and not only did it limit the flow, but it was still loud. I upgraded to a larger capacity overflow and just put a whole foam block over the outlet, I clean it at the same time I clean my sock. The other thing that helped mine a lot is the cover that you get with the CPR overflows. it's just a piece of acrylic that sits over the top of the back, but it cuts down seriously on the noise! The only noise I have now is coming from my skimmer, Ugh, that's annoying.

 

[DrHank]

3/4" pvc is 3/4", 1" is 1". Unless the durso is constructed with smaller pvc than the skimmer box drain, you can't reduce flow. The water level level in the overflow box will rise (it's supposed to) but the flow won't be restricted. My overflow is a CPR. Don't buy a durso, make it yourself. That way you will know it's done correctly.

 

[reefD]

thanks guys! i fixed it with airline tubing. i have a hang on overflow and it worked for me. i dont mind the sound of water falling but this was a suctioning sound and the airline tubing worked! thanks again. great info about the durso stand as i have experience and will remember your advice! thanks again! great info!

 

[bbehring]

Yep airline tubing worked great for me also. I have internal overflow box with durso standpipe. Drilled a 5/16" hole and inserted about a 4 foot long piece of 1/4" OD tubing. Also installed a 1" gate valve between the 1" overflow bulkhead and the sump, then elbowed over with a T and vented a stack up to the top of the tank with a plug with drilled 1/8" hole. Used the gate valve to adjust ever so slightly and now the system is dead silent except for the hum of the pumps.

 

[kstockman]

mrvinman- Thanks for the positive review on the new design. I did it to make my life easier when I make the Aquasilencer. I guess the added benefit is that the desing is more effective.

The whole point of the air tube is so that you don't restrict the flow or air the to standpipe. If it is restricted, then you will get the flushing effect, when the pipe turns into a siphon. The air tube allows air to get in and to baffle the noise. If you listen to the end of the tube you will hear the gurgling.

I will be working on a device to counter act the air entering the sump. To eliminate the microbubbles and the noise. Top secret at this point--otherwise All-Glass Aquariums would steal the idea.

Cheers
ken