Help! What is the more silent pump, eheim 1046 12v or iwaki RD-XX (20 or 30)??

[lachinois]

Hi!

I'm finaly replacing my hydor L30 piece of s**** with something I hope is going to be better. All I can say about the L30 is that it was really lound in vibration, low frequency king of vibration. In fact, it vibrates so much that it is virtually impossible to silence. Now dont get me wrong, I really tried everything to get this pump's noise down. I placed bricks to absorb the sound waves, buried the reservoir in 50lb of sand, suspended the pump in the reservoir, placed some rubber pads underneath the reservoir... nothing really made the vibration go away. It was better, but hardly quiet by any means.

I read that the main two pumps that fall in the quiet category are either the eheim 1046 or the iwaki RD-30 or 20.

I'm looking for a pump, or two pumps in serie that could pass through 3 blocks and 1 big passive radiator like the Innovatek HTCS radiator (http://www.innovatek.de/contentServ/...hp?StoryID=767) (I cant say if its any good... but it is one darn nice piece of metal!).

The blocks are really low resistance blocks with wide tunnels and very few bends. However the radiator might be the biggest factor, since a big radiator might need a bigger pump.

However, my L30 was perfect for cooling my rig, so I guess any of the two models should replace fairly well.

Now, from your experiences, what would be the quiestest pump or pumps? Should I stay away from all 12v models and concentrate only in immersible pumps?

If the ikawi are the best, does anyone know where to buy them?

Thanks very much for any help you can give... I'm pretty desperate not to make the same error twice.

Regards to all,
Daniel Shane from Canada, The Great White North!

[Turbokeu]

Eheim pumps are inaudible, i.e. silent (even the 1250) if well dampened from the case.
The only noise you can hear is the typical short rattle of mag drive pumps at startup, or when there are remaining air bubbles in the loop passing through the impeller housing.

My 1250 is so silent that even from a few inches I can't hear anything.
Only when I touch the pump I can feel it's running (vibrations).

That's why I installed a digital flowmeter in my loop...

Can't speak for the Iwaki's as I never owned one.

CD

[lachinois]

Well at least the eheims are *widely* available. Is it true that any 12v pump will make more noise than its AC cunterpart?

Daniel

Originally Posted by Turbokeu

Eheim pumps are inaudible, i.e. silent (even the 1250) if well dampened from the case.
The only noise you can hear is the typical short rattle of mag drive pumps at startup, or when there are remaining air bubbles in the loop passing through the impeller housing.

My 1250 is so silent that even from a few inches I can't hear anything.
Only when I touch the pump I can feel it's running (vibrations).

That's why I installed a digital flowmeter in my loop...

Can't speak for the Iwaki's as I never owned one.

CD