Sump help

Dcollier · 01/13/2011, 11:07 AM

I am working on get a sump going on my tank. My question is I have an overflow box that does 600 pph , Now i cant find a pump that does 600 gph . So would i need to buy a 500 gph or a 700 gph ????

If anyone could back to me that would be great !!!!!!! doing some online shopping

sjmantis · 01/13/2011, 11:11 AM

http://www.marinedepot.com/Tunze_Rec...TZ1739-vi.html

phenom5 · 01/13/2011, 11:12 AM

Don't forget to figure in head loss. Head Loss Calculator

Personally, I would go with the 500gph. I would shoot for 3-5x through your sump.

jerrym21 · 01/13/2011, 11:13 AM

Did you check the pump rated output at a specified head. the height you are lfting the water and the amount of bends in the line greatly impact GPH. Your actual GHP output after figuring that out could be drasticly lower than the stated pump out put. Most pumps Gph is stated at 0 head.

evsalty · 01/13/2011, 11:22 AM

What pump to get is going to depend on many things. Your overflow is one of them but not the only one. Also you need to keep in mind that even though your overflow box has a single 1" bulkhead drain in it this does not mean that it truthfully can flow 600gph. A bulkhead at the bottom of a 18" deep tank may have enough water weight above the bulkhead to flow that 600gph but your HOB overflow will only have a few inches of water above the bulkhead and thus will not have enough pressure to push 600gph of water thru it. I would recommend looking to run 300gph or so thru that overflow.

For the pump side you now have a target flow rate but you have plumbing and friction working against you to achieve that 300gph. So for this you need to calculate your head loss that your pump will see due to things like verticle climbs and 90* turns. Horizontal runs of plumbing are not as bad on your pumps head loss but can add up over long distances. Once you figure out your head pressure (head loss amount) you can look for a pump that will flow that 300 at your tanks given head pressure.

The 300gph is just a number but you can see what I am meaning and just change numbers to fit your needs.

mgoblue · 01/13/2011, 11:54 AM

You will also want to plumb in a ball valve on the return line from the pump so that you can tune it back, if needed. You should also consider whether or not you may want to run any reactors off that pump or maybe a remote refugium later on if space allows in your cabinet.

WhoDey64 · 01/13/2011, 12:05 PM

Quote:

Originally Posted by mgoblue

You will also want to plumb in a ball valve on the return line from the pump so that you can tune it back, if needed. You should also consider whether or not you may want to run any reactors off that pump or maybe a remote refugium later on if space allows in your cabinet.

Spot on. And in my opinion always oversize your pump for the prior mentioned reactors, refugiums, chillers ect ect. Just be sure to put a ball valve on the output side (never restrict the intake).

sjmantis · 01/13/2011, 12:16 PM

Why not just get an overflow and adjustable pump rated at the same gph? I don't understand why it's so complicated. That's what I did and have had zero problems.

01/13/2011, 11:07 AM	#1
Dcollier Registered Member Join Date: Jan 2010 Location: Omemee , ON Canada Posts: 85	Sump help I am working on get a sump going on my tank. My question is I have an overflow box that does 600 pph , Now i cant find a pump that does 600 gph . So would i need to buy a 500 gph or a 700 gph ???? If anyone could back to me that would be great !!!!!!! doing some online shopping

01/13/2011, 11:54 AM	#6
mgoblue Registered Member Join Date: Oct 2010 Location: Grand Junction, MI Posts: 149	You will also want to plumb in a ball valve on the return line from the pump so that you can tune it back, if needed. You should also consider whether or not you may want to run any reactors off that pump or maybe a remote refugium later on if space allows in your cabinet. __________________ 1 kenya,1 toadstool, 1 branching frogspawn, 1 very small candycane, sinularia, GSP, Xenia, 2 firefish, pair of perculas. Current Tank Info: 75g, 20g sump, 15g fuge, 80# sand, 60# rock, 6x54w Aquaticlife T5HO, Oct 110-DNWB, Mag 9.5, 2xKoralia 1050, JBJ 300W htr, GFO reactor, grnd probe

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01/13/2011, 11:11 AM	#2
sjmantis On the cliff by the sea.. Join Date: Apr 2009 Posts: 561	http://www.marinedepot.com/Tunze_Rec...TZ1739-vi.html

01/13/2011, 11:12 AM	#3
phenom5 Unregistered Member Join Date: Jun 2003 Location: Arizona Posts: 5,096	Don't forget to figure in head loss. Head Loss Calculator Personally, I would go with the 500gph. I would shoot for 3-5x through your sump.

01/13/2011, 11:13 AM	#4
jerrym21 Premium Member Join Date: Sep 2004 Location: New Jersey Posts: 347	Did you check the pump rated output at a specified head. the height you are lfting the water and the amount of bends in the line greatly impact GPH. Your actual GHP output after figuring that out could be drasticly lower than the stated pump out put. Most pumps Gph is stated at 0 head.

01/13/2011, 11:22 AM	#5
evsalty hmmmmmm Join Date: Jan 2009 Location: NW Mesa, AZ Posts: 3,531	What pump to get is going to depend on many things. Your overflow is one of them but not the only one. Also you need to keep in mind that even though your overflow box has a single 1" bulkhead drain in it this does not mean that it truthfully can flow 600gph. A bulkhead at the bottom of a 18" deep tank may have enough water weight above the bulkhead to flow that 600gph but your HOB overflow will only have a few inches of water above the bulkhead and thus will not have enough pressure to push 600gph of water thru it. I would recommend looking to run 300gph or so thru that overflow. For the pump side you now have a target flow rate but you have plumbing and friction working against you to achieve that 300gph. So for this you need to calculate your head loss that your pump will see due to things like verticle climbs and 90* turns. Horizontal runs of plumbing are not as bad on your pumps head loss but can add up over long distances. Once you figure out your head pressure (head loss amount) you can look for a pump that will flow that 300 at your tanks given head pressure. The 300gph is just a number but you can see what I am meaning and just change numbers to fit your needs.

01/13/2011, 12:16 PM	#8
sjmantis On the cliff by the sea.. Join Date: Apr 2009 Posts: 561	Why not just get an overflow and adjustable pump rated at the same gph? I don't understand why it's so complicated. That's what I did and have had zero problems.