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I think you want them quite low in the overflow box to ensure the siphons don't break if water levels drops a bit. emergencies you want up high like thatThis is one of four siphon drains. There will also be four backup drains. Is this the appropriate height for the siphons?
1. A full siphon drain needs to be lower than the emergency drain - far enough below the water surface (when running) that it does not suck air.This is one of four siphon drains. There will also be four backup drains. Is this the appropriate height for the siphons?
680 gal with a 75 gal sump. It's drilled for 4 one-inch mains, and four 3/4" emergencies.Curious how big of a tank this is... 4 drains seems excessive.
The bottom of the drain will not be submerged in the sump - and therefore, I should not need break holes. So, I could put the main drains deeper in the overflow box. However, (if the siphon breaks temporarily) won't the siphon just reengage when the water level rises?I think you want them quite low in the overflow box to ensure the siphons don't break if water levels drops a bit. emergencies you want up high like that
How deep below water level is ideal for the main drains? I've seen people put them pretty close to surface, especially when they need break holes. I don't need break holes, so I could go deeper.1. A full siphon drain needs to be lower than the emergency drain - far enough below the water surface (when running) that it does not suck air.
2. Dursos are unnecessary on a full siphon (and in my book, unnecessary altogether.)
How deep below water level is ideal for the main drains? I've seen people put them pretty close to surface, especially when they need break holes. I don't need break holes, so I could go deeper.
So your view is that having this durso style head offers no advantage whatsoever?Herbie Overflow Plumbing Guide for Quiet Reef Aquariums - gmacreef
The Herbie method can quiet down your aquarium drain and eliminate microbubbles. The guide includes helpful diagrams and explains each component.gmacreef.com
Where they terminate is irrelevant, aside from the noise factor. And yes, a durso is worthless in my opinion.So your view is that having this durso style head offers no advantage whatsoever?
As I stated, 4 siphons and 4 emergencies, all terminating above the water level in the sump.
In what scenario could enough Main Drains be clogged such that 4 emergencies are insufficient to compensate?Your emergency drains should not be smaller than your main drains. You may want to switch them so the 3/4" are the drains and the 1" are emergency. Though with a tank the size of yours 3/4" piping seems too small.