How to size return pump

[Potatohead]

I would use something more in the 500 GPH range which will be more like 350 at 4' or so. I have a Tunze 1073.02 on my 36 bow and it's too big, I have it throttle back about halfway. Would probably be perfect for a 46.

[kzeller]

Originally Posted by Potatohead

I would use something more in the 500 GPH range which will be more like 350 at 4' or so. I have a Tunze 1073.02 on my 36 bow and it's too big, I have it throttle back about halfway. Would probably be perfect for a 46.

I am going big knowing that I plan to set up a 120 in the future so I am get some of the equipment that I know that I can use for this even if I have to run them at 1/4 of their capacities...

[SeattleReefer]

Originally Posted by billdogg

Can be easily adjusted with a ball or gate valve (and reduce energy consumption at the same time), track record for longevity better than any I am aware of.



I prefer to buy once even if it might cost a bit more rather than buy repeatedly because it has broken down again.

jm.02

each to his own, but your post contains several inaccuracies.

-restricting flow via valve does NOT reduce electrical consumption.

- you can buy two Jaebo pumps for the price of a single eheim. Put one on the shelf if you need piece of mind.

- the cost of running these pumps adds up. At Seattle electrical rates the eheim=$70/yr but the Jaebo running at half capacity (same volume flow)= $33/yr

so, to summarize, the eheim costs twice as much initially, and twice as much to run. Some bargain.

[SeattleReefer]

Originally Posted by kzeller

So to clarify. The 10 speeds that are "pre programmed". What if I need to be at 7.5 and there is only 7 and 8, use a gate valve to fine tune? do you have one of these yourself? Is this as reliable as the Eheim and as quiet? Im totally ok with spending more $$$ for a better, quieter unit....

the ten speeds roughly correspond to 10%, 20%, etc. Yes they are pre-programmed. I highly doubt that you need 7.5 and neither 7 nor 8 will do, but if that's the case then you can program in 1% increments via Jaebo--> neptune adaptor (you DO plan to get a controller eventually, right?)

reliable? that's always a matter of luck and/or maintenance. IMHO the pumps fail when they are not maintained. That applies equally to eheim or jaebo.

quiet? VERY quiet. I run the DCT15000 at approximately 2500gph and the pump is much quieter than any other component in the system.

[ThaBeast]

Originally Posted by SeattleReefer

the Jaebo pump has it's own included controller.



looks like a no brainer to me



Jaebo DCT8000- $87

68 watts

2113GPH

max head 14.8ft

included controller with 10 speed settings

can be integrated to Neptune with added accessory adaptor

Jaebo also has a slow start feature and run dry protection- not sure about eheim





Eheim 1262 - $190

80 watts

900GPH

max head 11'6"

no controller, no speed selection, no neptune adaptor

Google fire caused by Jaebo before making your choice.

[SeattleReefer]

Originally Posted by ThaBeast

Google fire caused by Jaebo before making your choice.

that search returned one possible fire. (first page results)

the same search for eheim returns three possible fires (heh- all three results posted by the same guy on different forums, so I guess one potential unverified fire)

[ThaBeast]

First page results for jebao--Two fires related to ac converter, one in Richmond va area and one in Dallas tx area. Two others I didn't bother to click on. Eheims run for years, you will be lucky to get more than a year out of that cheap pump. I have a problem with cheap equipment so I'll be quiet now.

[A sea K]

Originally Posted by kzeller

What is this calculator referring to when it asks pipe entrance/exits

Pipe exits will be how many nozzles on the return exit, not exactly sure on the entrance but I would have to assume 1 on most any system unless using a complex setup with more than one DT or frag tank plumbed to the same pump.

[eznet2u]

Originally Posted by SeattleReefer

-restricting flow via valve does NOT reduce electrical consumption.

You might want to check your facts a little better.

Savings
Installing throttling controls can save 5–25% of pump or fan energy use.
Power is proportional to the third power of flow rate. Throttling reduces flow rate, which results in lower power consumption.
To calculate the annual energy savings for installing/using throttling controls, the following equation can be used to determine the order of magnitude of savings:
kWh Savings = Rated Motor kW * (flow rate_new / flow rate_old)³




http://www.seai.ie/EnergyMAP/Energy_...peration1.html

Basic Engineering/Plumbing.

[SFish]

It also depends on if you use PVC on the return pump. Then the PVC diameter comes into play vs the output size of the pump. Also if you use 90s or Ts that will effect the flow of the pump. It's not as simple as look up the height the water has to go up.

[SFish]

Originally Posted by A sea K

Pipe exits will be how many nozzles on the return exit, not exactly sure on the entrance but I would have to assume 1 on most any system unless using a complex setup with more than one DT or frag tank plumbed to the same pump.

Some people have the return / water from the over flow go to the left and right side of the sump and put the return in the middle.

[kzeller]

So I am definitely intrigued by this controllable dc pump idea. Jebao probably isn't gonna be the one I get as there seems to be to many red flags. Eheim doesn't have one unless I'm just special and can't find one. Does anyone have a controllable pump that they recommend? Other than the jebao?

Sent from my SM-G900V using Tapatalk

[madweazl]

Originally Posted by billdogg

Can be easily adjusted with a ball or gate valve (and reduce energy consumption at the same time), track record for longevity better than any I am aware of.



I prefer to buy once even if it might cost a bit more rather than buy repeatedly because it has broken down again.

jm.02

Restricting the output with a valve will not reduce power consumption (usually the opposite).

As for reliability, there is no comparison between the two pumps; ehiem reliability is legendary. The other is a knock off design and doesnt use the highest quality parts as one might imagine.

[billdogg]

Originally Posted by eznet2u

You might want to check your facts a little better.

Savings
Installing throttling controls can save 5–25% of pump or fan energy use.
Power is proportional to the third power of flow rate. Throttling reduces flow rate, which results in lower power consumption.
To calculate the annual energy savings for installing/using throttling controls, the following equation can be used to determine the order of magnitude of savings:
kWh Savings = Rated Motor kW * (flow rate_new / flow rate_old)³




http://www.seai.ie/EnergyMAP/Energy_...peration1.html

Basic Engineering/Plumbing.

Originally Posted by madweazl

Restricting the output with a valve will not reduce power consumption (usually the opposite).

Didja not see (or choose to ignore) this post?

[A sea K]

Originally Posted by SFish

Some people have the return / water from the over flow go to the left and right side of the sump and put the return in the middle.

Not real sure where your going with this but the "return" is simply the return to the tank from the circulation pump, at least that has always been my understanding.

[Pmj]

Originally Posted by kzeller

So I am definitely intrigued by this controllable dc pump idea. Jebao probably isn't gonna be the one I get as there seems to be to many red flags. Eheim doesn't have one unless I'm just special and can't find one. Does anyone have a controllable pump that they recommend? Other than the jebao?

Sent from my SM-G900V using Tapatalk

Others make DC pumps as well, like Ecotech. I have a Jebao DC pump and it works great. I do need to buy a spare though...

[Timfish]

Originally Posted by Pmj

. . . I do need to buy a spare though. . .

+1 (We should all have backup spares of any critical equipment)

[hkgar]

Originally Posted by kzeller

What is this calculator referring to when it asks pipe entrance/exits

I have one point of entrance into the pump and the return line splits to two exit point - one on each side of the DT