As the title says, I need some advice with my DIY overflow. Bear with me as I might ramble a bit but the points/questions will be there somewhere!
I'm starting a 72g bowfront build, All-Glass (Aqueon) non reef ready tank that I will have the rear glass drilled (I think only bottom and front are tempered).
Initially, I'll be running +/- 507 gph, Rio 2500 using Reef Central's Head Loss Calculator.
For that flow, using the RC Drain Flow Calculator, I'll need a drain @ 0.93" with a linear overflow @ 8".
I'm using something similar to what ibmgeek used in this thread
with 1-1/2" x 3" reducers
According to the calculation that I found, linear overflow size equals Pi (3.14285) x diameter.
So using all of this information, a 1" PVC drain would more than handle the flow, and this reducer (3.5" internal diameter) should meet the minimum linear overflow @ 10.99".
1st Question:
This fitting satisfies the minimum requirement, but what will happen when I notch it to become a toothed overflow? How would you calculate the loss from the teeth? Common sense would tell me that if I cut a 1/4" notch every 1/4", then I would effectively lose half my available overflow. This isn't my planned notching, but used for a simple example.
While this setup will handle my initial flow, I most certainly will increase the flow at a later date, probably closer to 800-900 gph. According to the calculator, I would need a drain @ 1.24" and a linear overflow @ 14" to handle 900 gph.
2nd Question:
Are these numbers theoretical and I do need to allow for a variance say 5%, and that if I'm looking @ 900 gph I need to build a drain that can handle 945 gph (5%)?
3rd Question:
If I instead drill 2 bulkheads now, I could get away with two 1" drains to handle the flow, but do I add the linear overflow size together? Would it be easier to just create 2 overflows now, each designed for 450-500 gph?
4th Question:
Would only providing these 2 overflows with 507 gph (combined) cause any noise problems initially?
Thanks for any help that I get and feel free to ask me questions if needed!
I'm starting a 72g bowfront build, All-Glass (Aqueon) non reef ready tank that I will have the rear glass drilled (I think only bottom and front are tempered).
Initially, I'll be running +/- 507 gph, Rio 2500 using Reef Central's Head Loss Calculator.
For that flow, using the RC Drain Flow Calculator, I'll need a drain @ 0.93" with a linear overflow @ 8".
I'm using something similar to what ibmgeek used in this thread
with 1-1/2" x 3" reducers
According to the calculation that I found, linear overflow size equals Pi (3.14285) x diameter.
So using all of this information, a 1" PVC drain would more than handle the flow, and this reducer (3.5" internal diameter) should meet the minimum linear overflow @ 10.99".
1st Question:
This fitting satisfies the minimum requirement, but what will happen when I notch it to become a toothed overflow? How would you calculate the loss from the teeth? Common sense would tell me that if I cut a 1/4" notch every 1/4", then I would effectively lose half my available overflow. This isn't my planned notching, but used for a simple example.
While this setup will handle my initial flow, I most certainly will increase the flow at a later date, probably closer to 800-900 gph. According to the calculator, I would need a drain @ 1.24" and a linear overflow @ 14" to handle 900 gph.
2nd Question:
Are these numbers theoretical and I do need to allow for a variance say 5%, and that if I'm looking @ 900 gph I need to build a drain that can handle 945 gph (5%)?
3rd Question:
If I instead drill 2 bulkheads now, I could get away with two 1" drains to handle the flow, but do I add the linear overflow size together? Would it be easier to just create 2 overflows now, each designed for 450-500 gph?
4th Question:
Would only providing these 2 overflows with 507 gph (combined) cause any noise problems initially?
Thanks for any help that I get and feel free to ask me questions if needed!
