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-   -   tank overflow prevention? (http://www.canreef.com/vbulletin/showthread.php?t=46731)

superduperwesman 11-20-2008 03:51 PM
Quote:
Originally Posted by asmodeus (Post 361546)
Craig its really easy to sort out here keep your plumbing the same way open your ball valve full open.
what you need to do is drill a small hole in your return pipe just above the water line in your tank. This is going to allow you to back siphon the water once it reaches the water line so make the hole just below the water line then the pump goes off the water will drain only to the pipe with the hole. SUPER EASY
This doesn't address his issue... he's trying to use the ball valve to reduce noise... Basically you want a Herbie so your gonna need 2 drains

superduperwesman 11-20-2008 03:52 PM
Quote:
Originally Posted by Parker (Post 361555)
I'd take the ball valve off the drain side and put it on the return side ( after the pump ) if you want to limit the flow.
Then he'll get less turnover and still have the noise issue?? The only reason his drain occasionally has problems with keeping up to the pump is because he has it restricted... and the only reason he is limiting the drain flow is for noise and bubbles not because he wants less actual flow to the tank

Myka 11-20-2008 04:11 PM
Quote:
Originally Posted by cwickham (Post 361518)
hey

i use ball-valves to limit the return from my main tank to the sump. I adjust the level of the tank so that the return is completely under water to reduce micro bubbles and noise.

The problem is that if the power goes out and the tank level drops, air gets into those pipes and when the power comes back on, the air gets trapped at the ball-valve and limits the flow even more cause my tank to overflow if im not there to release the air.

is there any way around this, is there somthing that will shut my return pump off when the water gets to a certain level(just for emergency if im not home)

i have tryed to find a normally open float switch to make somthing, but can only find normally closed ones.

thanks for your help
craig

I haven't read this entire thread, so if it hasn't been mentioned yet, check out the Herbie style overflow, and see if you can mod yours like that. :)

Parker 11-20-2008 04:20 PM
Quote:
Originally Posted by superduperwesman (Post 361578)
The he'll get less turnover and still have the noise issue??

IF he is running his return pump wide open at the moment that's all the flow he will ever get out of that pump. If the drain is noisy that's a seperate issue that's needs to be addressed by a solution other then placing a valve on the drain.

Running a valve on the drain is a very dangerous way to regulate flow or noise, snail goes down his drain = flood, valves starts to gather crap, clumps of algae = flood, fish goes down the drain = flood, and it will happen eventually. It's always best to regulate flow on the return side.

phillybean 11-20-2008 04:22 PM
Why not put a strainer on the intake side to prevent anything big from getting in the pipe?

On mine, I have a valve but leave it open. I have a strainer to prevent anything large from getting in it.

As an added precaution my overflow box / return pump section are small enough that there is no way for my tank to flood.

superduperwesman 11-20-2008 04:23 PM
Quote:
Originally Posted by Parker (Post 361590)
IF he is running his return pump wide open at the moment that's all the flow he will ever get out of that pump. If the drain is noisy that's a seperate issue that's needs to be addressed by a solution other then placing a valve on the drain.

Running a valve on the drain is a very dangerous way to regulate flow or noise, snail goes down his drain = flood, valves starts to gather crap, clumps of algae = flood, fish goes down the drain = flood, and it will happen eventually. It's always best to regulate flow on the return side.
ahah that's exactly why I said he was crazy in the first post... UNLESS you have a back up drain. I don't think he's try to "regulate flow" to the tank he just trying to reduce noise and bubbles like he mentioned in his first post which is why he is trying to control the out flow to reduce the air in the line which is why he needs a herbie style drain

He could try a few other methods... but the ball valve would seem to indicate that he's leaning toward a herbie?? Which is the quietest :)

superduperwesman 11-20-2008 04:30 PM
Quote:
Originally Posted by phillybean (Post 361591)
Why not put a strainer on the intake side to prevent anything big from getting in the pipe?
I think you can still get a slim build up after some time that will change the outflow enough to slowly overflow your tank even if you had it adjusted perfectly to begin with

untamed 11-22-2008 05:58 AM
Quote:
Originally Posted by cwickham (Post 361572)
that would work, but id like to keep the same amount of flow, just reduce how fast it flows from the main tank to the sump
That's impossible. Water always flows to the sump at the same rate it is pumped out of the sump. If something prevents this from happening, you have overflow.

cwickham 11-22-2008 07:13 AM
Quote:
Originally Posted by untamed (Post 361988)
That's impossible. Water always flows to the sump at the same rate it is pumped out of the sump. If something prevents this from happening, you have overflow.

water doesnt have to flow back into the tank as fast as its pumped up, you can restrict it to find a good balance between over flow and the perfect level.



I agree with all of you that restricting the overflow is a dangerous game, and eventaully will get clogged. I think im just going to build an electronic shut off. water gets to high for any reason, pump turns off, water drains out pump turns back on. Probably be the easyiest solution.

thanks for all your comments

Canadian 11-22-2008 02:30 PM
Quote:
Originally Posted by cwickham (Post 361992)
water doesnt have to flow back into the tank as fast as its pumped up, you can restrict it to find a good balance between over flow and the perfect level.
For all intents and purposes it does (have to flow from the display tank at the same rate it is pumped to it by the return pump). If it didn't you'd either slowly (or quickly depending upon the disparity) overfill the display tank --> too much water in the display tank --> wet floor.

The most efficient and economical solution is to add another emergency drain line a la the Herbie method.


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