Quote:
Originally posted by BeanAnimal
What is your proposed flow? It is likely that (6) standpipes are not at all needed. Trying to balance multiple siphons may be tough. Multiple open channels should not be a problem, but each will add the possibility of the noise of falling water. When several objects make the same nearly silent sound, the additive nature of sound ensure that it is no longer silent 
The 1.5" standpipe allows the open channel to flow more water quietly by allowing more air space and less change of gurgling or partial siphon. The larger the open channel diameter, the better.
The larger diameter Siphon and Emergency drains help to increase their capacity by lowering resistance.
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Bean
My main return pump is about 1900gph @ 0' (but my tank is 10' above the pump and I will divert some flow to the refugium) so say around 1200gph from the overflow. If having two systems is not a good idea and being the anal retentive person that I am (I'm afraid of overflowing the tank and flooding my house) should I then use three of the six holes for your type of overflow and leave the other three as triple emergency overflows (each set at a slightly higher level)? Or possible as inlets for a CL (or would that starve my sump)?
Thanks
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Alan
"Never in the field of human conflict was so much owed by so many to so few. "
Sir Winston Churchill praising those young RAF pilots.
August 20th 1940
Click on my name for drop down list and select "Visit EnglishRebels Home Page" for my build thread.
Current Tank Info: 60x30x24 200G AO custom glass tank, basement equipment room, 30G and 55G Fuges, LifeReef sump & 30" skimmer.
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