Pumps: External Question

[stubbsz]

The reef devil is supposed to be compatible with.. and I quote from superskimmer.com:

Pumps: Catalina 1800, Catalina 2200, Magdrive #7, Iwaki 20 RLT, Blue Line 20HD

The Magdrive is supposed to be 700 GPH and the pan world equivalent of the iwaki (40PX) is rated 480gph.

Is one rated at the point it comes out of the pump and the other at 10 feet above it or something?

Many thanks
-Adrian

 

[bladze]

You want mag 7

 

[stubbsz]

Care to elaborate?

 

[Elite]

Iwaki 20 RLT - Flow Rate @ 4` Head: 420 GPH

 

[stubbsz]

Phong, is that a recommendation. I have a pan world as my return pump and they are far cheaper and very similar.

-Adrian

 

[Elite]

I'm using the 50pxx and I like it. I don't have Iwaki so I don't know. I would use the PanWorld since you already have it.

From Marine Depot:
Pan World Magnetic Water Pumps are built by a former chief engineer from Iwaki-Japan. It basically has the same specifications such as flow curves, high head pressure and reliability. It also features seal-free bearings and magnetic drive for trouble-free use. These pumps are actually a bit quieter than Iwaki pumps and costs less making it a good or even better alternative. Plus, it comes with a power cord unlike Iwaki pumps.

 

[jdieck]

They are both rated at zero feet.
You need to compare the point from the performance curves at at which the pumps will be running.
Red Devil skimmers require pressure to operate and as such they work beteen 6 and 8 feet head pressure. From the performance curves below you will see that the Mag7 and the Iwaki 20 RLT are equivalent in that range of operation. Both pumps will deliver the same flow regarding of the rating at 0 head. the difference is that the Iwaki will perform better under pressure than the Mag drivce.
I would recommend the use of the Iwaki. the price difference really worth the trouble free operation.

 

[Elite]

jdieck,
How does the Iwaki compare to the Pan World?

 

[jdieck]

<a href=showthread.php?s=&postid=9931840#post9931840 target=_blank>Originally posted</a> by Elite
jdieck,
How does the Iwaki compare to the Pan World?

The pan world has a bit lower maximum head at 13.5 feet while the Iwaki 20 has 14.4 feet, that only makes a difference in operations were the pressure is on the higher limit. For the skimmer in the range of 6 to 8 feet the rating is close enough for the Pan World to work fine.
Aa a comparison in that range the Iwaki will give about 379 gph at 6.6 feet of head pressure while the Pan World will do 349 gph at the same 6.6 feet which is also close to the 340 of the Mag Drive 7.

If you already have it use it, it shall work OK
Here are more detailed curves for both pumps..

http://iwakiwalchem.com/nav/CMImage.aspx?CMID=0&Name=20Rstandardcrv.pdf

http://www.panworldamericas.com/PX/60Hz/A3400320.pdf

 

[stubbsz]

jdieck

Thanks for shedding light on this.

What I meant about the Pan World was not that I had one to use with the skimmer but that I have another that I use for my return pump... a bigger one.

I will go with external if I can just figure out how to fit everything in. An external pump and a double union in front of it is gonna be difficult... I already have an external pump and the skimmer sitting outside the sump. Gotta get creative here which is not my strong suit.

Thanks again.
-Adrian

 

[jdieck]

If you are using insert connections you may not need the unions, also it you are using internal threaded bulkheads you can use a threaded plug, just thread the plug on the inside of the bulkhead from inside the sump and you do not even need a valve to maintain the pump. Even if you need a valve and you have room inside the sump, you can install the valve inside the sump.

 

[stubbsz]

<a href=showthread.php?s=&postid=9933739#post9933739 target=_blank>Originally posted</a> by jdieck
If you are using insert connections you may not need the unions, also it you are using internal threaded bulkheads you can use a threaded plug, just thread the plug on the inside of the bulkhead from inside the sump and you do not even need a valve to maintain the pump. Even if you need a valve and you have room inside the sump, you can install the valve inside the sump.

Not sure what you mean with the first statement... maybe or maybe not because i don't know what and insert connection is I guess.

On the second option...I guess I see what you are sayin there, just put a ball valve inside the sump .... That last chamber is pretty small but with an elbow that might work

 

[jdieck]

Just trying to give you alternatives if you are space limited. The normal external pump installation involves a slip and glue bulkhead, a short piece of PVC pipe, a slip ball valve, a shor piece of PVC pipe, a slip union, a slip adapter, a threaded to hose adapter a hose and then agaon a hose to thread adapter and finally whatever reduction fitting needed to match the pump inlet.
The valve is supposed to make it easy for you to close the inlet and then disconnect the union so you can easily maintain the pump without having to empty the sump. The piece of hose is an aid to reduce noise and vibration trough the pipe and sump.
When shorrt in space the union can be avoided if the hose can be easily accesible to be pulled out of the insert fitting. The valve can be avoided using an internally threaded bulkhead that can fit a threaded PVC plug.