Noisiest overflow EVER!! HELP!!

hyrumbradshaw

hyrumbradshaw

New member
Ok I got this idea here on RC, looked like a dang sweet idea! I tried longer pipe, shorter pipe, bigger holes smaller holes, more holes less holes etc.....nothing helped. It is constantly making crazy gurgeling noises.

please help.....

3/4 bulkhead, 3/4 pipe....

hyrumbradshaw
 
I read that original thread and I can't really remember for sure, but I think they were able to get it run quieter by twisting the pipe with the holes up more toward the surface. Dang it!! Now I gotta go back and read that thread again.
 
i started with two rows of holes they all got covered with water, so i went wit a third row and they are on top and cannot be seen, you can see however the little funnel being sucked into the first top hole...

no I do not have a "T" is that my problem??
 
Hmmmmmm......just went back and reread it and I guess I was wrong. The twisting of the pipe is to adjust the water level, not to make it quieter. Even though, you might try it, just to see if it helps any.
 
yeah i have tried all 360 possible degrees doesnt help! I think I am gonna try that "T" thing tomorrow and see if that helps
 
I would think that is your problem. Without that, it has to pull air from the overflow itself.
 
You need a tee on the outside with an end pointing straight up. extend the "up" end to above tank water level. glue on a cap that you drill a small hole in. Start with an 1/8 inch hole and be prepared to drill bigger and bigger. Might be 1/4 or more depending on flow you have through drain. Do a search on durso's, that is what you are building.
 
Also, it seems that the flow is too high for what you currently have designed there. Water shouldn't be over the pipe completely.

Once you put a proper vented durso in the back, this problem may just correct itself though.
 
Part of your problem is that your pipe will not handle the flow you are wanting to put into it. If all of the holes are under water it is to much flow. You can't quite it down if you are trying to flow more than the plumbing can handle in a non-siphon setup.

Kim
 
Here's a pic of my drain with T as they are describing, very similar drain to what you have. I will say that mine even with the T is a lot noisier than I would have hoped for. Mine is 2in drain cage, reduced to a 1.5in elbow at the bulkhead then 1.5in to the sump.
drain2.jpg
 
the flow has to be reduceded inside the tube aswell...for the 3/4" bulkhead you should have a 1" pipe in the tank....the bottleneck will slow the flow down and really help to reduce noise...then you need the durso to purge the pipe of air so it cant create a rolling siphon...if the hole is too small the pipe will siphon and you will either get flushing or whistling...if the hole is too big the tank will over flow...

as mentioned above you will have trouble pushing too much water through a 3/4" bulkhead...especially if you going for a gravity drained tank...with a semi-siphon you should be able to get about 300 or so GPH though...under a full siphon i would think you could do about 500 or so gph..though...

i used to have a 3/4" drain with a mag9 and though my overflow box was a little shallow i found the pump wasnt able to keep up with a full siphon and it would suck air for a second break siphon then flood my tank...strangely enough your wife will not appreciate that...
 
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