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Old 02-21-2014, 09:39 PM   #61
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How big are those drains? Both 1"?

Both 1.5"
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Old 02-21-2014, 09:45 PM   #62
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No. If the power goes out, the return will back siphon until it sucks air....This means waking up to an empty tank. I wouldn't want to trust a check valve in a salt water application either. They do sell the ones that you can open and clean easily, without breaking down the plumbing, but how would you? While you were cleaning it, the tank would empty.

You could always add a ball valve to close so you can clean the check valve.
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Old 02-25-2014, 11:39 PM   #63
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got the tank up onto the stand. Cut out the wall to allow the overflow box to slide into the storage room( where the sump will be).

Plumbing starts tomorrow!
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Old 02-26-2014, 12:39 AM   #64
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That looks sharp, after your big 800
Build this looks tiny. I love how simple and clean the stand looks.
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Old 02-26-2014, 08:36 AM   #65
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Is there any support under that overflow box? There will be a non-trivial load on the bottom glass panel when it is running..
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20 gallon nano-reef torn down to make way for the 40B Reef (original thread and current update).
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Old 02-26-2014, 09:15 AM   #66
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Is there any support under that overflow box? There will be a non-trivial load on the bottom glass panel when it is running..

Have you ever done a custom tank before? Or made a stand? Or have any idea about structural integrity of different materials?(ie structural engineering background )
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Old 02-26-2014, 09:28 AM   #67
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No yes and yes.

If that over holds say 5 gallons of water, thats 40lbs supported by the silicone seams and the bottom panel. Granted the center of mass is well supported overall, but you create a line of stress where the stand stops supporting the tank. Under a static load condition, it should be o.k. but as engineer, i prefer to err on the side of caution.

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Old 02-26-2014, 09:48 AM   #68
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I agree with dmolavi I would support that overflow. It would be cheap and easy and give you piece of mind. Just my $.02 though
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Old 02-26-2014, 10:14 AM   #69
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No yes and yes.

If that over holds say 5 gallons of water, thats 40lbs supported by the silicone seams and the bottom panel. Granted the center of mass is well supported overall, but you create a line of stress where the stand stops supporting the tank. Under a static load condition, it should be o.k. but as engineer, i prefer to err on the side of caution.

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Didn't mean to offend, just trying to get an idea of where the advice is coming from.

I had a structural engineer do a site visit for my bigger tank which weighed over 10,000lbs , the cost was worth the piece of mind. The stand for that tank was only built with 2x6 spruce as per his recommendations.


This tank is also built with structural adhesive, the same stuff used by seaworld, pretty strong stuff.

I will support the overflow with a vertical 2x4 brace .
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Old 02-27-2014, 11:39 AM   #70
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Just picked up pieces of glass to partition my sump.

it will be 55g,4ft long
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