spray bar hole size

[PrettyBoy]

My spray bar setup is 3/4" pipe, not sure what pump I will be using but i want a lot of flow in this tank, keep the bottom super super clean. What size holes do I drill in the pipe for the spray bar and how many. I want to say I read somewhere to drill the holes every 1" of pipe, just dont remember what size to drill the holes. Also am I drilling the holes so the water shoots straight out of the pipe on a horizontal or am I doing it so they more shoot down to the bottom on an angle?

[PrettyBoy]

bump

[Kimberfish]

Marineduud on here did mine and every other hole alternates between spraying horizontal then more verticle. If I remember correctly the holes are bigger towards the end where the water enters and get smaller towards the opposite end. I would estimate the biggest hole around ~dime sized and the smallest about pencil eraser size in diameter

[PrettyBoy]

thanks, any more input from anyone

[DarthOcellaris]

here's a bump for ya

[motorslave]

Spray bars take a large amount of water volume so depending on the size, the pump should be large also. The holes should be around 1/8 or larger. The bigger the holes the larger volume moved and the bigger the pump needed. Holes should be drilled straight down at the tank bottom an also at angles to provide a sweeping effect. Since water takes the path of least resistance, you want the holes, or flow, less near where the water enters the spray bar and more as its gets farther away. Also drill holes to direct water behind the bar and as much as possible, don't place it along the glass or acrylic, you want some space back there for flow. You don't need a fire hose back there, just a good amount of coverage. Detritus doesn't weigh much, just make sure you have flow all around and it will be pushed out and kept in suspension.

[PrettyBoy]

Originally Posted by motorslave

Spray bars take a large amount of water volume so depending on the size, the pump should be large also. The holes should be around 1/8 or larger. The bigger the holes the larger volume moved and the bigger the pump needed. Holes should be drilled straight down at the tank bottom an also at angles to provide a sweeping effect. Since water takes the path of least resistance, you want the holes, or flow, less near where the water enters the spray bar and more as its gets farther away. Also drill holes to direct water behind the bar and as much as possible, don't place it along the glass or acrylic, you want some space back there for flow. You don't need a fire hose back there, just a good amount of coverage. Detritus doesn't weigh much, just make sure you have flow all around and it will be pushed out and kept in suspension.

the way I did it now was i drilled 1/8" holes every 1 inch and I staggered them to flat and angled up. I just read your post so Im going to drill a few holes along the back side tomorrow. I want to have a lot of flow keeping the bottom clean, would a dart be good or should I be looking more along the lines of a hammerhead? Should I add a few more holes? I built 4 seperate spray bars that come off a 1.5" manifold and enter the tank a 3/4"

[DarthOcellaris]

Here is a great thread that I need to update soon:
http://www.thereeftank.com/forums/sh...light=diameter

Now that it's warmer, I'll be working on this tank again

[PowerManJ316]

I'm following along carefully too. Trying to design my spray bar. I was also looking to do a Dart as well. The only thing that doesn't make sense to me is large holes near the inlet. I would go opposite because you are going to have higher pressure near where the spray bar is fed from. So I would do 1/8" holes here and on the opposite end of the spraybar I would go just slightly larger. The larger holes will promote a more equal flow since there is less pressure at the far end of the spraybar. I think some testings is gonna be the best. Luckily it's just 3/4" PVC so making a new ones a sinch.

[ScruffyRubicon]

So how did you end up drilling? Larger towards the far end or larger towards input?

[x1fstsolx]

being a newbie i just went out on a limb and made this and i think it could be improved but works good in my 37gal