Looking for caculator for bulkhead size

allincuddy · #1 03-08-2006, 05:14 PM

I had one on some place on the internet, punch in the size of bulkhead and it would tell you how many gallons (capacity) it would do. Now I must have deleted it and need to do a calculation.
I have a 7/8" ID on a 65 and wondered if that would give me 3 turn overs or 195 gal. per hour??
If anyone can help, I would appreciate it.
Thanks.

christyf5 · #2 03-08-2006, 05:44 PM

http://www.reefcentral.com/calc/drain.php

allincuddy · #3 03-08-2006, 05:52 PM

Thank you, exactly what I was looking for.
Thanks again.

TheReefGeek · #4 03-08-2006, 06:59 PM

That calculator looks a little dangerous.

Is it assuming there is pressure on top of the bulkhead or not?

G1GY · #5 03-09-2006, 03:03 AM

Quote:

Originally Posted by TheReefGeek

That calculator looks a little dangerous.

Is it assuming there is pressure on top of the bulkhead or not?

It's for drains. So that would probably mean "free flowing".

allincuddy · #6 03-09-2006, 03:14 AM

Well I have a 7/8 inch bulkhead on a 65 gallon tank andit says that size will do 440 gal/hr so that is amax. of 8 turn overs, should be good to go.3 tun overson afrag tank should be good?????
Thanks.

Samw · #7 03-09-2006, 03:17 AM

What is linear overflow size? It says that I need 5" for a 300GPH flow.

mark · #8 03-09-2006, 03:20 AM

Quote:

Originally Posted by Samw

What is linear overflow size? It says that I need 5" for a 300GPH flow.

total measurement of overflow tower (wier).

Samw · #9 03-09-2006, 04:10 AM

So this is the height from the top of overflow to the top of the waterline of the sump right?

TheReefGeek · #10 03-09-2006, 04:27 AM

No, the linear measurement means how long of a distance the water can flow over.

Imagine a waterfall. It is 10 meters across. This is the type of measurement you want.

Now for your overflow, say you have a standard corner overflow, you have two lengths you have to add up for the total linear measurement.

Quote:

It's for drains. So that would probably mean "free flowing".

"Probably" is not a good term in plumging a reef.

Leads to too many floods. That is why this calculator is dangerous. Good as a gernal guide though, a starting point better than nothing.

If you have 20 inches of water in your overflow pushing down on the drain, it is going to flow faster than if you have 5 inches of pressure.

Also you can get some suction/siphoning going, but that is not recommended.