spray bar

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08 Jun 2016 20:47 - 08 Jun 2016 20:53 #1 by carlowchris (chris)
Thinking of redoing my returns into a spray bar....it's not the usual choice in a marine tank but after having bad experiences with the cp40..Thinking about trying to spread out some flow without spending a load of money.

Is there any rules about spray bars??
How far holes should be apart??
How big should the holes be??
size of pipe depending on flow??

It's going to be about 3500lph .I've 25 mm and 20mm ridgid pipe her so hoping to use tha

I am also thinking about returning water to the bottom of the tank and drilling a hole in the return pipe to break the syhon should the power go out...

How big would the hole need to be to suck enough air to break the syphon??
Last edit: 08 Jun 2016 20:53 by carlowchris (chris).

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08 Jun 2016 21:23 #2 by robert (robert carter)
Replied by robert (robert carter) on topic spray bar
don't know to much about the spray bar but guess its trial and error .the less holes the stronger the spray reckon 8mm holes 1 inch apart would be a good starting point ,you can then either make the holes bigger or add more holes until the spray is to your liking . reguarding the syphon hole mine that Bart did is 3 mil

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08 Jun 2016 22:32 #3 by carlowchris (chris)
Replied by carlowchris (chris) on topic spray bar
Thanks ...would that be ok for 25mm pipe or would I be better off reducing down to 20mm pipe for the extra length of the spray bar???

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08 Jun 2016 22:34 #4 by nomad (pat murphy)
Replied by nomad (pat murphy) on topic spray bar
Were would you put the hole in an external filter set up to stop the tank draining in a powercut with a back syphon...

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08 Jun 2016 22:40 #5 by irish-zx10r (James feenan)
Its very simple look up YouTube for the overflow and for the spraybar I used a old eheim spray bar and pipe I just did some diy to suit the pump

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Can't finish the painting till I move a 6ft tank lol

Something fishie going on here

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08 Jun 2016 22:52 #6 by carlowchris (chris)
Replied by carlowchris (chris) on topic spray bar
Thanks James.....I was never thinking of a vertical spray bar...but I quite like that idea. B)

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08 Jun 2016 22:59 #7 by irish-zx10r (James feenan)
It looks rough now because its out of water for a few weeks but fully setup it works like a treat and I never had any trouble look up my videos on YouTube there should be something there where did u get the 25mm pipe I can't get any over here I am also looking for 90 deg bends for the 25mm pipe

Something fishie going on here

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08 Jun 2016 23:16 #8 by carlowchris (chris)
Replied by carlowchris (chris) on topic spray bar
I got it in seahorse..

As for as I remember all plumbing in there is about 3euro...
3euro. Meter of pipe
3euro for an elbow
3euro for a t peice

And so on.

Cheap enough...can't see why they wouldn't pop them in the post to ya.

Other alternative is the water fixings that woodies sell are 22mm.they fit purfectly inside of a 25mm union.and then use 22mm pipe instead..

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08 Jun 2016 23:20 #9 by irish-zx10r (James feenan)
I probably just make the parts I need in work and get some pipeing from there I stick up few photos tomorrow night once I am finished

Something fishie going on here

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08 Jun 2016 23:35 #10 by carlowchris (chris)
Replied by carlowchris (chris) on topic spray bar
You could try what we used to do with areil poles...

Put a long spring inside and heat the tube and then bend into shape.

I'm presuming plummers do the same with copper pipes.

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09 Jun 2016 12:27 #11 by Jonlate (Jon Late)
Replied by Jonlate (Jon Late) on topic spray bar
Wouldn't a spray bar on a marine tank add la lot of micro bubbles?

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09 Jun 2016 15:56 #12 by carlowchris (chris)
Replied by carlowchris (chris) on topic spray bar
It probably would...that was part of the reason of thinking of returning to the bottom of the tank.....

Thinking of a vertical spray bar now.....shouldn't be many air bubbles hopefully but it's all an experiment really.need to get a couple of end caps and a drill suitable for plastic...

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