? about the diy overflow

[fishdance]

Take a small section of PVC (I used 1/2") and make a big U shape. Then get a peice of 1" and cap the bottom. Install a "T" where you want the water level to be, hang it on the tank (I used a PVC hanger zip tied to the 1" tube), put the "U" in the 1" tube and the tank then it's done. Just fill the 1" tube and install an air line check valve on the "U" to pull the air out.

I think this is the method that Li and a couple of others are using. It's working great for me.

I am sure some of you know but this photo is the same concept simplified into a single pipe. (I modified your photo Rallysman) The height of the T will determine the water level height in the tank just like the first photo. I use 40mm PVC pipe for high flow rates which lies flat against the tank unlike this image.

 

[rallysman]

I am sure some of you know but this photo is the same concept simplified into a single pipe. (I modified your photo Rallysman) The height of the T will determine the water level height in the tank just like the first photo. I use 40mm PVC pipe for high flow rates which lies flat against the tank unlike this image.

those would work the same, but the DIY overflow sticky posted here seems to get air into the system because it's skimming the surface. That's what I've experienced anyway. When a fish splashes like mad when feeding, the DIY in the sticky seems to get air in it.

The only reason I like the first image is that it's easier to fine tune the water level.

 

[AndrewMack]

those would work the same, but the DIY overflow sticky posted here seems to get air into the system because it's skimming the surface. That's what I've experienced anyway. When a fish splashes like mad when feeding, the DIY in the sticky seems to get air in it.

The only reason I like the first image is that it's easier to fine tune the water level.

im kinda confused by this, it looks like a piece of PVC pipe shaped like a U. i don't really understand where the T comes into place. I had planned on putting a 90º elbow on the inlet of my overflow with a filter sponge on it, to help eliminate the amount of air that gets into the overflow, also i planned on putting a aqualifter pump or hooking a line to a venturi to help make sure it wont lose prime. Rallysman can you please post pictures of yours

 

[craigthor]

I'm looking at both if I draw from the bottom with a tee at my water level do you still have the same issue as using it to draw from the water surface as a skimmer? Need to get from my sump to my basement....

 

[mike dunagan]

How well does this work for a overflow for a sump setup? It is good enough for my 110?

 

[craigthor]

How well does this work for a overflow for a sump setup? It is good enough for my 110?

Mike in the DIY articles stick EH has a huge write up about the PVC overflow this is great for a DIY autochanger as it flows slower but the other writeup has alot more info for a Regular the ideas are the same just the tee has to go lower.

Craig

 

[mike dunagan]

Okay I add one of the DYI from the article and it will not keep up with my 2200 L pump... any ideas? Should I just add another one?

 

[rednhot]

euge's got it right, but the loop doesn't have to reach the bottom of the tank to work.

...or you could use the first plan and put a small pump to suck the airbubbles out of the smaller pipe...

 

[sypherz28]

for me the drawings are a lil confusing. Is it generally just a syphon effect thats going on? Better yet anyone have a DIY they can get together with pictures? If I can get a good idea of exactly what I need to do Ill put one together so everyone can make one happen. I'm in dire need of such a design cause im refusing to drill through my 55gal tank for the overflow to my sump im DIY'ing.

 

[mike dunagan]

okay so I made another one.... this one was able to keep up on its own... it is just a tad lower, but I have both running just in case... It was really difficult to get it going right... but today is my test day... so far 5 hours without a problem... why was the other one unable to keep up? The new one I made the loop go deeper into the tank than the one you gave me...