Little Giant Pumps

[carlos_fb]

I'm looking for an external pump for my sump and I'm considering the Little Giant 2-MDQX-SC.

Any comments or suggestions?

 

[Krish]

I've heard good things about little giant pumps. Never tried one, but heard good things. I know there was a series though that had to be oiled every few months. Not sure if that goes for all of their pumps or just that particular series, but I'm sure someone here will know

 

[mfinn]

Little Giant pumps are great pumps.
They do have the coolong fan that does make some noise, but so do almost all external pumps.

 

[mfinn]

But if you want a real quiet small pump look at the Iwaki MD20RLXT

 

[carlos_fb]

I was going to get an Iwaki but then I heard that they transfer a lot of heat to the water.

 

[JPG@CFI]

Iwaki pumps do not transfer heat. They are one of the best. Only untill the 100 you need to worry about heat. I have installed plenty.
Jason

 

[mfinn]

I was going to get an Iwaki but then I heard that they transfer a lot of heat to the water.

Never had problem with the ones I had.
So quiet, I had to put my hand on them to tell if they were running.

 

[carlos_fb]

So which one would you recommend for my setup?

Iwaki WMD30RLXT?

 

[mfinn]

What is your overflow rated for? That will determine the pump you use.

 

[carlos_fb]

I have a 1" bulkhead drain which is suppose to be around 600 gph.

 

[mfinn]

So which one would you recommend for my setup?

Iwaki WMD30RLXT?

That one would be too much flow.
Also, if you are looking at the Iwakis, check out the MD series, they tend to be a little quieter.
They may be more up front, but in the long run worth it.

 

[carlos_fb]

That one would be too much flow.
Also, if you are looking at the Iwakis, check out the MD series, they tend to be a little quieter.
They may be more up front, but in the long run worth it.

That's what I thought. I was considering getting the WMD40RLT but then read this:

RLT pumps are for pressure applications. RLXT pumps are for circulation and wet/dry return.

 

[mfinn]

The 40 would be too much pump.
In the Iwaki's I think you need to look at the 20 series.

 

[carlos_fb]

The 40 would be too much pump.
In the Iwaki's I think you need to look at the 20 series.

The thing is that the guys that made my tank drilled two 1/2" bulkhead returns and I would like to use them both but I know the return would lose some preasure in the split so I was thinking that getting a pump a little bit stronger would compensate for that. What do you think?

 

[mfinn]

That might add a little more head pressure, but not a whole lot.

 

[carlos_fb]

That might add a little more head pressure, but not a whole lot.

The 40 says 750 gph @ 4 head, but splitting the return I guess it would be around 600 gph, am I right?

 

[mfinn]

Your drain is only capable of 600gph at the best of times. You need to get a pump that does a little under the drain max.
I think you should be aiming for around 450 to 500 gallons per hour taking into account head pressure.

 

[Dave 777]

I have 2 Little giant 4-mdqx on 2 of my tanks and I love them. They are quiet for me. My wife has no complaints on the noise level. I have had one for 2 or 3 years. I think I oil it every 6 months with 2 or 3 drops of oil. Great pump in my opinion.