Head loss help

Blu3s94 · 10/15/2018, 07:00 PM

Can someone check me on this? I have a jebao 4000 rated at 1056 gph.

I have a 125 gallon tank, 40 gallon sump.
I have
(4) 90s
(1) ball valve
(2) unions
8' vertical 3/4" schedule 40
6' horizontal 3/4" schedule 40
2 exits
1 inlet

I'm calculating 9 ft head loss. Which is max for this pump... so to get 5x turnover at 150 gallons of tank volume, what size pump do I need? Would prefer to stick with jebao.

I have this pump maxed out and hardly any water comes out of the returns. Been like this for over a year lol but never had any problems. Redid my sump and plumbing and noticed not much was coming out of lines....

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slief · 10/15/2018, 10:13 PM

I suspect you have more that 9’ of head. Probably closer to 10’. Are you using a T fitting to feed the two “exits”? If so, PVC Wye would be much better. Either way, you’re going to need at least a 8000 if you are sticking with Jebao for 5x turnover with that head loss. With an 8000, you likely won’t have to run it at full power and might even have some breathing room to feed a manifold for reactors down the line. Keep in mind that when looking at the specs of the 8000, I am pretty sure they are based on 1” output. While they come with a 3/4” barb, your 3/4” plumbing will add additional head pressure to that pump since it’s max ratings are based on larger diameter plumbing.

Blu3s94 · 10/16/2018, 07:12 AM

Quote:

Originally Posted by slief

I suspect you have more that 9’ of head. Probably closer to 10’. Are you using a T fitting to feed the two “exits”? If so, PVC Wye would be much better. Either way, you’re going to need at least a 8000 if you are sticking with Jebao for 5x turnover with that head loss. With an 8000, you likely won’t have to run it at full power and might even have some breathing room to feed a manifold for reactors down the line. Keep in mind that when looking at the specs of the 8000, I am pretty sure they are based on 1” output. While they come with a 3/4” barb, your 3/4” plumbing will add additional head pressure to that pump since it’s max ratings are based on larger diameter plumbing.

Yes its coming off a T. I went ahead and got the Jebao DCP 10000. Guess I can just dial it back if its a little too much.

Thank you for confirming my head loss was in the ballpark of what I figured

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hkgar · 10/16/2018, 11:58 AM

DC pumps do not handle head pressure very well.

10/15/2018, 07:00 PM	#1
Blu3s94 Registered Member Join Date: Sep 2016 Posts: 269	Head loss help Can someone check me on this? I have a jebao 4000 rated at 1056 gph. I have a 125 gallon tank, 40 gallon sump. I have (4) 90s (1) ball valve (2) unions 8' vertical 3/4" schedule 40 6' horizontal 3/4" schedule 40 2 exits 1 inlet I'm calculating 9 ft head loss. Which is max for this pump... so to get 5x turnover at 150 gallons of tank volume, what size pump do I need? Would prefer to stick with jebao. I have this pump maxed out and hardly any water comes out of the returns. Been like this for over a year lol but never had any problems. Redid my sump and plumbing and noticed not much was coming out of lines.... Sent from my SM-G960U using Tapatalk

10/15/2018, 10:13 PM	#2
slief RC Sponsor Join Date: Sep 2009 Posts: 14,173	I suspect you have more that 9’ of head. Probably closer to 10’. Are you using a T fitting to feed the two “exits”? If so, PVC Wye would be much better. Either way, you’re going to need at least a 8000 if you are sticking with Jebao for 5x turnover with that head loss. With an 8000, you likely won’t have to run it at full power and might even have some breathing room to feed a manifold for reactors down the line. Keep in mind that when looking at the specs of the 8000, I am pretty sure they are based on 1” output. While they come with a 3/4” barb, your 3/4” plumbing will add additional head pressure to that pump since it’s max ratings are based on larger diameter plumbing. __________________ Director Customer Support Royal Exclusiv USA For All Royal Exclusiv & Bubble King questions please refer to our Sponsor forum: http://www.reefcentral.com/forums/fo...play.php?f=745 Current Tank Info: 480G display mixed reef, 90G sump, 90G refugium, 60G display refugium. Check out my build thread: http://www.reefcentral.com/forums/showthread.php?t=1783476 Last edited by slief; 10/15/2018 at 10:20 PM.

10/16/2018, 11:58 AM	#4
hkgar Registered Member Join Date: Oct 2002 Location: Dewitt MI Posts: 5,051	DC pumps do not handle head pressure very well. __________________ Gary 180 gallon, 40 gallon sump, 3 250 W MH + 4 80W ATI T5's, MTC MVX 36 Skimmer, Apex controller Aquamaxx T-3 CaRx Current Tank Info: A 2 Barred Rabbitfish, Red Head Salon, Yellow/Purple, McMaster Fairy, Possum, 2 Leopard Wrasses, Kole, & Atlantic Blue Tangs, 2 Percula Clown, 3 PJ and 1 Banggai Cardinalfish , Swallowtail, Bellus and Coral Beauty Angels