materials for small scale diy overflow - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 05-24-2011, 03:06 PM Thread Starter
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materials for small scale diy overflow

I'm would like to try and make a diy overflow for my shrimp tank using the smallest possible tube size and of course try to keep the cost down since this is just a trial. I'm looking into using 1/4" tubing used for RO connections but the fittings are kind of expensive, about $4 a pop to make the bends.

Anyone have an idea of small size tubing I can use that has 180 or elbow fittings that are cheap.


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post #2 of 7 (permalink) Old 05-24-2011, 05:30 PM
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CPVC tubing, sold at Ace Hardware (at least at my local Ace Hardware) come in 1/2 inch size, and the 1/2" is the outside diameter, not the inside diameter. I have used it for an overflow, and it worked fine, but I wouldn't want to try anything smaller. Even this gives you a very small flow rate, so if you are adding water to the tank and wanting this to keep up with the incoming flow, it isn't good for that.

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post #3 of 7 (permalink) Old 05-24-2011, 05:57 PM Thread Starter
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Is this CPVC? I use an airline when adding water to my shrimp tank so that it goes in slow on one side of a 20 long. I have it divided into three so I cannot drain water fast. Also, if this overflow works, maybe I can set it up as a continous drip from my RO tank.

This is the reason I thought of using the 1/4" tubing.

I also saw your post on the overflow Hoppy. That is what I was trying to recreate with the small tubes.


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post #4 of 7 (permalink) Old 05-24-2011, 06:48 PM
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Quote:
Originally Posted by reybie View Post
Is this CPVC? I use an airline when adding water to my shrimp tank so that it goes in slow on one side of a 20 long. I have it divided into three so I cannot drain water fast. Also, if this overflow works, maybe I can set it up as a continous drip from my RO tank.

This is the reason I thought of using the 1/4" tubing.

I also saw your post on the overflow Hoppy. That is what I was trying to recreate with the small tubes.
It looks like CPVC, but I'm not sure. As long as you are just dripping in the inlet water I think the 1/4" tube would work ok. I was adding about 5 gallons per hour flow rate, and my overflow couldn't begin to handle that much. I now have a PVC overflow on another tank and it flows much better, with around twice the tube diameter.

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post #5 of 7 (permalink) Old 05-25-2011, 10:02 PM Thread Starter
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I found them for $2/elbow online, will have to see how much they sell it here locally.


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post #6 of 7 (permalink) Old 05-26-2011, 12:07 AM
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Small diameter cpvc pipe and fittings should be very cheap at Lowe's/Home Depot, like $0.50 per fitting or less for 1/2".
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post #7 of 7 (permalink) Old 05-26-2011, 08:42 PM Thread Starter
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I will give the local HD/Lowes a try. I will try the cheaper route first since this is just a trial.


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