Canreef Aquatics Bulletin Board - Standpipe Problems

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- - Standpipe Problems (http://www.canreef.com/vbulletin/showthread.php?t=26850)

Quote:

Originally Posted by Samw

I tried both Durso and Stockman's for my standpipe and both were loud. Then finally, I just took a pipe and drilled a whole bunch of holes randomly near the top of it and used that as the standpipe and it was dead silent. Its super simple and its been working for months. I don't know why no one else does it and what its drawbacks are. My flow is about 300GPH.

I figured that it is quiet because no whirlpool is created and there is no air being sucked down the pipe. The water is sucked down at full speed at the bottom holes while the water trickles in slowly at the top few holes so there is no splashing and almost no bubbles formed. The result is a quiet overflow with almost zero bubbles coming out of the return.

I don't think anyone does it because most people have MUCH, MUCH more than 300 gph going down their standpipes. I know I've done what you're describing in the past at 700ish gph and it would gurgle unless I capped the unit. Even then, I wasn't able to push more flow through the unit without drilling more holes in the standpipe; this would just defeat my original intent.

Quote:

Originally Posted by albert_dao

Why can't you drill more holes? Just curious. I'm not sure why twice as many holes over the length of a larger pipe wouldn't work for 600-700GPH. The idea is to have the water flowing into the top holes at such a slow rate that there is no splashing and no sucking of air into the pipe.

any prefabbers haha?

Quote:

Originally Posted by Samw

I don't know why no one else does it and what its drawbacks are.

that was my original setup, a few things that are not good about it.. only handles lower flows (the higher flows in durso's and stockman are obtained by creating a suction using the air and then getting rid of the air. free flow in to a tube like my old set up and what you are using doesn't preform quite as well) and algae plugs it up fast so it is a lot of upkeep.

other than that it was good.

Steve

I originally put a cap on my standpipe with one hole, this was ok for a while, until salt started to build up and restrict the air flow, I then drilled about 5 holes in the top of the cap and have had no problems since. I can't tell the difference in the noise level between one hole and five.