OverFlow directly to scrubber

[wdc1160]

If this is redundant please link me with the pertinent info.

I lost my sump during a house fire (fireman mishap).

I have no room above the tank. Or, at least I don't want a scrubber up there.

Can I have an over-flow that would provide the proper pressure to the scrub bar?

I have a 3.5 foot drop I have a 2 inch mainly straight drop to the bar. The bar will need to accommodate a 2 foot screen.

I have no idea how what I need, but I think I know what I have. A 2 inch pipe holds 530 CU Inches of water - 2 gals. About 16 pounds should pull down on the water above Subtract 10 percent friction loss and ID of pipe. Could this pipe server to feed the scrub bar?

Anyone else do this, I have seen no one specifically reference

[Gigaah]

You don't need pressure for the scrubber. Yes you can run it off your overflow. many people do. In fact I do as well.
The main factor you need is flow 35gph per inch of slit in pipe or more no pressure requirements.

[wdc1160]

Thank you for the reply.

Maybe my use of pressure was misleading.

As you stated 35 gallons per inch of screen is required. What size bar could I support with a 1 inch overflow? My attempted calculation was an explanation for someone who knew more about overflow rates than I. Specifically the 1 inch pipe could move more water the longer the fall (up to a point). I was trying to provide some specifics.

Thank you

[Gigaah]

I am not sure of the overflow pipe size. But I do know that 3/4" pipe is good for atleast 600gph

[SantaMonica]

Screen Width-----Gallons Per Hour (GPH)

1" 35
2" 70
3" 105
4" 140
5" 175
6" 210
7" 245
8" 280
9" 315
10" 350
11" 385
12" 420
13" 455
14" 490
15" 525
16" 560
17" 595
18" 630
19" 665
20" 700


If you are doing an overflow feed, the overflow will determine how much flow you have to work with. You have to start from there, and size your screen accordingly. The maximum flow you'll get to the screen will be what's going through your overflow now. This is easy to figure out by counting how many seconds it takes your overflow to fill a one-gallon jug:

60 seconds = 60 gph
30 seconds = 120 gph
15 seconds = 240 gph
10 seconds = 360 gph
8 seconds = 450 gph
5 seconds = 720 gph


Take this gph number that you end up with, and divide by 35, to get the number of inches wide the screen should be. For example, if your overflow was 240 gph, then divide this by 35 to get 6.8 (or just say 7) inches. So your screen should be 7 inches wide.

How tall should the screen it be? That is determined by how much screen area you need, which is determined by how many gallons you have. Try to get one square inch of screen (lit both sides) for every gallon. If lit on only one side, double the screen area.

When finished, this is how you want your flow to look:

http://www.radio-media.com/fish/UserZennzzoOnMFK-05.jpg