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Iwaki MD55RLT Water Pump (Japanese Motor)


Starting at $34/mo with . Learn more

Item #: IK1153

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*Seperate Power Cord is required for use.

Magnetic water pumps. Magnetic driven. Sealless pumps for use on fresh or saltwater aquariums. Low heat exchange . Highly durable design. WMD pumps have American Made Motors. MD pumps have Japanese Made Motors. RLT pumps are for pressure applications. RLXT pumps are for circulation and wet/dry return.

Iwaki Walchem magnetic drive pumps will run longer, quieter and cooler than any traditional mag drive. Extraordinarily high efficiencies make WMD & MD the clear choice in almost every process, recirculation or transfer application.

Unique internal Cooling Circuit
Creates a positive, forced cooling path, lubricating bearing surfaces and actively purging gases & heat. Unique double bearing system allows cooling circuit liquid to continually "wash" front and rear radial bearings, extending bearing life.

Precision Tolerances
Pumps can be supplied with alumina ceramic or SiC spindles, bored, turned and highly polished. This precision machined spindle forms the center of the driven magnet. Substantially reduced hydraulic noise is a major feature of all WMD/MD impellers. Great pains are taken in the molding/finishing process to eliminate tangential misalignment.

Bearings/Thrust surfaces
High lubricity fluoropolymer bearings minimize mechanical losses typical of conventional mag drive pumps. High purity SiC radial bearings handle the most aggressive ultrapure chemistries. PTFE front thrust surface aids hydraulic balance and minimizes flashing. Large rear thrust surface guards against axial forces caused by cavitation or gas entrapment.

Drive magnet
Dynamically balanced barium ferrite drive magnets provide best magnet torque. Die cast magnet carrier creates a flywheel effect, which adds to the magnet safety factor.

Motor matching
Offering more standard motor/pump configurations than other manufacturers offer for tailored pump applications. Premium, high efficiency motors are used throughout the line. Totally enclosed, permanent split capacitor motors are compact, cool and economical. Tolerance to voltage variation without overheating and 50/60 Hz operation allow the product to be used in a worldwide market.

Model: MD55RLT*
Inlet(MPT)/Outlet(MPT): 1"/1"
Flow Rate @ 4` Head: 1080 GPH
Max Head ft: 26.9

*Note - IWAKI RLT are Pressure Rated pumps designed to pump into pressure canister filters or any situation that can create back pressure. IWAKI XT models are for standard circulation such as return from wet/dry. The pressure models are also suitable for standard return.

Note: Power outlet plug NOT included.







Max Flow

Max Head

Max Sys



MD55RLT 1" 1" 1/9 3400 1.6 18.4 26.9 17.1 1.2 10
MD70RLT 1" 1" 1/4 3400 2.8 25.6 31.8 21.3 1.0 13
MD100RLT 1" 1" 1/3 3400 3.4 35.6 39.0 25.6 1.2 18

Warranty Information:

In the unlikely event there are any problems with Iwaki water pumps or warranty work is needed at some point, please contact Iwaki directly at 508.429.1440 for an RMA. Do NOT send a pump back to Iwaki without an RMA number. Please contact us at 714-385-0080 for any assistance you may need in this unlikely situation.

Warning as required by state law - This product can expose you to chemicals including Diantimony Trioxide, which is known to the State of California to cause cancer, and Bis (2-ethylhexyl) phthalate which is known to the State of California to cause birth defects or reproductive harm. For more information go to: www.P65Warnings.ca.gov

Manufacturer information

Iwaki America Inc.
Iwaki America Inc. of Holliston, Massachusetts, is a joint venture which grew from a 15 year association between Walchem Corp. of Holliston, MA and Iwaki Co. Ltd. of Tokyo, Japan. Combining Walchem`s 30 years of chemical injection and control experience with Iwaki`s 50 years of pump design engineering, Iwaki America offers the best chemical handling equipment for use in Process, O.E.M., Industrial and Semiconductor applications. Iwaki America, along with Walchem Corporation and Terracon Corporation comprise the Walchem Group.

5 Stars


Reviewed on
July 09, 2017

Yes, I would recommend this.

A great pump

Pros: Quiet, nice head curve

Cons: Expensive

I own 2 of this pump. They are reliable and quiet. Great performance but pricey. I will use Iwaki again

Was this review helpful? 3 0

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