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Iwaki MD-20RXT (Japanese Motor) 822 GPH

Iwaki MD-20RXT
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  • Iwaki MD-20RXT
  • Iwaki MD-20RXT
  • Iwaki MD-20RXT

Iwaki MD-20RXT (Japanese Motor) 822 GPH

100% Recommend this to a friend (4 of 4)

SKU: 300407
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Quick Overview

External pump from Iwaki, the world leader in small magnetically coupled centrifugal pump technology. Japanese-made motor is designed especially for aquatic applications. Super quiet and energy efficient with less parts.

  • Max Flow: 822 GPH

  • Max Head: 8.2 Ft

  • 1” Inlet(MPT)/1” Outlet(MPT)

  • Max Amps: .50

  • Motor Output: 1/38 HP


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Previously Asked Questions

  • by owen on April 2, 2014, @1:36 PM

    is pump good for a 90 gallon tank

    Bulk Reef Supply Hi Owen,
    Assuming your not pumping some sort of unusually large distance (like up from a basement) then this would be a great choice and a pretty typical flow rate for a pump on a 90g tank.

    Do you find this question helpful?  Yes   No

Full Details

High quality external pump with years of research and development behind its design. Iwaki pumps offer high pressure rates in a durable, compact pump. Easily tailor pump applications because of the numerous motor/pump configurations. MD stands for Mag-Drive.

MD Series – Japanese Motor

  • Japanese motor is made from cast aluminum with a cast end bell
  • Japanese uses a custom pump design specifically for aquatic applications
  • Japanese pumps run cooler to the touch and slightly quieter, due to the thicker material

Quick Compare - Iwaki MD Pumps (Japanese Motors)


Power Usage

Maximum Flow

Maximum Head


Iwaki MD-20RT


492 GPH

14.1 ft

Hose 5/8” NPT ¾”

Iwaki MD-20RXT


822 GPH

8.2 ft

Hose 1” NPT 1”

Iwaki MD-30RT


600 GPH

17.7 ft

Hose ¾” NPT ¾”

Iwaki MD-30RXT


1140 GPH

13.5 ft

Hose 1” NPT 1”

Iwaki MD-40RT


822 GPH

21.3 ft

Hose ¾” NPT ¾”

Iwaki MD-40RXT


1344 GPH

15.4 ft

Hose 1” NPT 1”

Iwaki MD-55RLT


1104 GPH

26.9 ft

Hose 1” NPT 1”

Iwaki MD-70RLT


1536 GPH

31.8 ft

Hose 1” NPT 1”

Iwaki MD-100RLT


2136 GPH

39.0 ft

Hose 1” NPT 1”



4 Items

  • Very quiet By Miguel on 1/28/2015

    Great quality, powerful, low power consumption
  • Little noisy By AdamSabina on 9/8/2014

    If you use this pump you have to use silicone hose or flexible PVC in between the pump in the tank and also the pump and the return. It vibrates which turns into noise. But wow does it pump a lot of water.
  • Pretty good By AdamSabina on 9/8/2014

    Be sure to plane enough room to have 4-5" of flexible PVC between the pump and the sump and the return. My pump puts enough vibration into the sump so it's a little noisier than I like. But WOW does it pump a LOT of water.
  • compact and quite By JASON on 9/5/2013

    I was debating on getting this style pump because they tend to be noisy, so I hear and to my surprise It is way quieter than I expected. Infact I can't hear it over the the other pumps and water movement in my sump.

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