eheim 2000

[Palluk33]

I'm thinking to buy this pump for return in my 40gl cube. Anyone using this pump? Just looking for some feedback thx

 

[Cory]

Eheim makes excellent pumps. I just hate how hard it is to open.

Just dont buy a danner mag drive. Really dislike them, noise, restart issues.

 

[mcarroll]

By reputation they are good pumps, but we need more info about your system. How high is the return compared to the sump, for example?

Assuming you have a fairly standard setup with a basic return, the 2000 looks like it should deliver about 220 GPH.

You only need 80 GPH (2x) to 160 GPH (4x).

Should be about right unless your situation is dramatically different.

3/4" plumbing will add about one additional foot of head pressure at this flow rate, so if this is a concern, upgrade to 1" plumbing....friction loss is close to zero with 1"

Liquid Friction Pressure Loss
Pressure Loss (psi): 0.4 Head Loss (ft): 0.9
Line Number:
Date: 12/29/2016
Nominal Pipe Size: 0.75
Pipe Schedule: SCH 40
Flow Rate (gpm): 7
Viscosity (cP): 1
Specific Gravity (water=1): 1.025
Temperature (F): 79
Pipe Roughness (ft): 0.000016
Actual Pipe ID (in.): 0.824
Fluid Velocity (ft/sec): 4.21
Reynolds Number: 27538
Flow Region: Turbulent
Friction Factor: 0.025
Overall K: 3.29
Piping Length (ft): 5
Short Radius Elbows: 1
Pipe Exit : 1

Liquid Friction Pressure Loss
Pressure Loss (psi): 0.14 Head Loss (ft): 0.3
Line Number:
Date: 12/29/2016
Nominal Pipe Size: 1
Pipe Schedule: SCH 40
Flow Rate (gpm): 7
Viscosity (cP): 1
Specific Gravity (water=1): 1.025
Temperature (F): 79
Pipe Roughness (ft): 0.000016
Actual Pipe ID (in.): 1.049
Fluid Velocity (ft/sec): 2.6
Reynolds Number: 21632
Flow Region: Turbulent
Friction Factor: 0.026
Overall K: 2.94
Piping Length (ft): 5
Short Radius Elbows: 1
Pipe Exit : 1

 

[lion king]

I have the eheim compact plus pumps on all 3 of my tanks. If the flow rate and head pressure is what you are looking for, you can't go wrong.

 

[Palluk33]

By reputation they are good pumps, but we need more info about your system. How high is the return compared to the sump, for example?

Assuming you have a fairly standard setup with a basic return, the 2000 looks like it should deliver about 220 GPH.

You only need 80 GPH (2x) to 160 GPH (4x).

Should be about right unless your situation is dramatically different.

3/4" plumbing will add about one additional foot of head pressure at this flow rate, so if this is a concern, upgrade to 1" plumbing....friction loss is close to zero with 1"

Liquid Friction Pressure Loss
Pressure Loss (psi): 0.4 Head Loss (ft): 0.9
Line Number:
Date: 12/29/2016
Nominal Pipe Size: 0.75
Pipe Schedule: SCH 40
Flow Rate (gpm): 7
Viscosity (cP): 1
Specific Gravity (water=1): 1.025
Temperature (F): 79
Pipe Roughness (ft): 0.000016
Actual Pipe ID (in.): 0.824
Fluid Velocity (ft/sec): 4.21
Reynolds Number: 27538
Flow Region: Turbulent
Friction Factor: 0.025
Overall K: 3.29
Piping Length (ft): 5
Short Radius Elbows: 1
Pipe Exit : 1

Liquid Friction Pressure Loss
Pressure Loss (psi): 0.14 Head Loss (ft): 0.3
Line Number:
Date: 12/29/2016
Nominal Pipe Size: 1
Pipe Schedule: SCH 40
Flow Rate (gpm): 7
Viscosity (cP): 1
Specific Gravity (water=1): 1.025
Temperature (F): 79
Pipe Roughness (ft): 0.000016
Actual Pipe ID (in.): 1.049
Fluid Velocity (ft/sec): 2.6
Reynolds Number: 21632
Flow Region: Turbulent
Friction Factor: 0.026
Overall K: 2.94
Piping Length (ft): 5
Short Radius Elbows: 1
Pipe Exit : 1

More info... the pump will be 56 inches from the bottom of the sump, cube is drilled with 1 inch drain and 3/4 return but the tank come with 1/2 inch return pipe just need something quite and reliable.

 

[nicholas.babb@gmail]

I have one for my nano. Good pump so far (6 months)

 

[mcarroll]

More info... the pump will be 56 inches from the bottom of the sump, cube is drilled with 1 inch drain and 3/4 return but the tank come with 1/2 inch return pipe just need something quite and reliable.

Apparently head is measured from the water line, not the pump, so that's pretty close to 4' of head pressure.

I'm not positive how you calculate a change in pipe diameter for just the last couple of feet – I guess it could be as simple as computing the friction loss for the 1" section and simply adding that to the loss computation for the 1/2" section...but flow rates are going to be different in the two sections and that's where I'm not sure.....maybe @Brew12 can explain how to figure this?

But just to give you an idea that such small diameter is not without cost, I've re-run the same calculations (see below) as the ones above, but with four feet of 1" and then 1/2" plumbing.

Summary: You can see that using 1/2" would add about three feet of head pressure, almost doubling the head pressure on your pump to about 7', and dropping the flow rate of the 2000 to about 95 GPH.

Still within your range, but at the bottom of it. Ideally you will not use 1/2" all the way!

Liquid Friction Pressure Loss
Pressure Loss (psi): 0.12 Head Loss (ft): 0.3
Line Number:
Date: 12/30/2016
Nominal Pipe Size: 1
Pipe Schedule: SCH 40
Flow Rate (gpm): 7
Viscosity (cP): 1
Specific Gravity (water=1): 1.025
Temperature (F): 79
Pipe Roughness (ft): 0.000016
Actual Pipe ID (in.): 1.049
Fluid Velocity (ft/sec): 2.6
Reynolds Number: 21632
Flow Region: Turbulent
Friction Factor: 0.026
Overall K: 2.64
Piping Length (ft): 4
Short Radius Elbows: 1
Pipe Exit : 1

Liquid Friction Pressure Loss
Pressure Loss (psi): 1.26 Head Loss (ft): 2.8
Line Number:
Date: 12/30/2016
Nominal Pipe Size: 0.5
Pipe Schedule: SCH 40
Flow Rate (gpm): 7
Viscosity (cP): 1
Specific Gravity (water=1): 1.025
Temperature (F): 79
Pipe Roughness (ft): 0.000016
Actual Pipe ID (in.): 0.622
Fluid Velocity (ft/sec): 7.39
Reynolds Number: 36482
Flow Region: Turbulent
Friction Factor: 0.023
Overall K: 3.34
Piping Length (ft): 4
Short Radius Elbows: 1
Pipe Exit : 1