Bulkhead distance from Glass edges

[ReviloM]

What's the least in distance that you can have a bulkhead from the edge of the glass without it cracking/damaging the glass from pressure when the tank is filled?

[AZDesertRat]

When LeeMar built my current 100G they told me to stay a distance from the outside edge or top/bottom equal to the bulkhead outside diameter size at a minimum. I used 1" inside diameter bulkheads so stayed like 1.75" away from the edges.

[ReviloM]

When LeeMar built my current 100G they told me to stay a distance from the outside edge or top/bottom equal to the bulkhead outside diameter size at a minimum. I used 1" inside diameter bulkheads so stayed like 1.75" away from the edges.

Thanks!

[Mr. Microscope]

+1. I followed the same guideline.

[ReviloM]

+1. I followed the same guideline.

Thanks!

[ReviloM]

Also, another question:

 

Which would be better (2) 3/4" Bulkheads or (4) 1/2" bulk heads for draining?

 

I am trying to get close to the edge as possible while maintaining a high water line. the water will be pumped in through 1/2" bulkhead. I want to make sure it will be enough for water to drain out.

 

Also, no fish. CUC is only big turbo snails for now because they seem to do a great job alone.

 

The pump will be 476gph but I can adjust the flow.

[Mr. Microscope]

Research herbie style overflow. It allow for a range for GPH and can be dead silent.

 

BTW, I have a 1/2 return and use a herbie style overflow with 2x 3/4 bulkheads.

[ReviloM]

Research herbie style overflow. It allow for a range for GPH and can be dead silent.

 

BTW, I have a 1/2 return and use a herbie style overflow with 2x 3/4 bulkheads.

No overflow box. Naked Glass box. I will use vinyl tubing to deaden some of the sound.

[AZDesertRat]

What size display and sump and what is your desired overflow rate?

 

I prefer to keep it simple so have an internal offset overflow box with a single 1" standpipe and two 3/4" returns, one in each upper rear corner. I think the multiple overflow thing is a fad and provides little if any benefit over a properly designed overflow and return system. Mine has been functioning fawlessly for about 12 years now with zero issues and it is fed by a WaterBlaster HY-5000 return pump running wide open unrestricted with no overflow noise. With the Stockman standpipe it is protected from snails and debris yet has great flow characteristics. There is more than one way to do things and often old school is just fine.

[ReviloM]

36x15x13. No sump. bulkheads are for use here: http://www.nano-reef.com/topic/351297-easy-water-change-tank/page-2#entry4831689

 

What size display and sump and what is your desired overflow rate?

 

I prefer to keep it simple so have an internal offset overflow box with a single 1" standpipe and two 3/4" returns, one in each upper rear corner. I think the multiple overflow thing is a fad and provides little if any benefit over a properly designed overflow and return system. Mine has been functioning fawlessly for about 12 years now with zero issues and it is fed by a WaterBlaster HY-5000 return pump running wide open unrestricted with no overflow noise. With the Stockman standpipe it is protected from snails and debris yet has great flow characteristics. There is more than one way to do things and often old school is just fine.

[AZDesertRat]

YoSo it sounds like you are doing a closed loop?

1/2" bulkheads should be work fine in that case, they will not stick out like a sore thumb while still giving you plenty of flow. If its just a closed loop the level of the bulkheads doesn't matter, the water is always contained unlike a gravity overflow where the bulkhead, standpipe or overflow box governs the display water surface level. You actually don't want the suction bulkheads close to the surface since they will suck air and create microbubbles when it returns.

[ReviloM]

YoSo it sounds like you are doing a closed loop?

1/2" bulkheads should be work fine in that case, they will not stick out like a sore thumb while still giving you plenty of flow. If its just a closed loop the level of the bulkheads doesn't matter, the water is always contained unlike a gravity overflow where the bulkhead, standpipe or overflow box governs the display water surface level. You actually don't want the suction bulkheads close to the surface since they will suck air and create microbubbles when it returns.

Um...it's not a closed loop either. Thanks for the reply. I choose to go with 1/2".