Iwaki L-MD-70RZM Liquid End Mag-Drive – Wet End Kit for MD-70RZ Series Pumps
If your Iwaki MD-70RZ magnetic drive pump is losing flow, leaking at the casing, or just showing its age, the L-MD-70RZM liquid end is the direct-fit wet end kit built to bring it back to full working order. This kit includes everything on the fluid-handling side of the pump: the front casing, rear casing, impeller, and O-ring, all manufactured to Iwaki's original specifications so the rebuilt pump performs like new. Because the design is sealless, there are no mechanical shaft seals to wear out or leak over time, which makes this kit a straightforward way to extend the working life of your pump rather than replacing the entire unit.
The liquid end is molded from glass fiber reinforced polypropylene, giving it strong resistance to a wide range of corrosive and aggressive fluids while keeping the assembly lightweight and easy to install. The rotating spindle design paired with the magnetic coupling means power is transferred to the impeller without any direct contact between the motor shaft and the wetted parts, so there's nothing to grind, drip, or seize under normal use. This construction is trusted across many industries, not just marine or boating applications, and shows up just as often in laboratories, water treatment plants, electroplating lines, HVAC circulation loops, and general industrial fluid transfer systems.
Swapping in a genuine Iwaki liquid end kit is one of the most cost-effective ways to restore pump performance without the expense of a full replacement unit. Because the L-MD-70RZM is built to the exact tolerances of the original MD-70RZ series pump, technicians can rebuild the wet end quickly, confident that the fit, flow characteristics, and chemical resistance will match factory performance.
Key Features
- Sealless magnetic drive design eliminates mechanical shaft seals and reduces leak points
- Front casing, rear casing, impeller, and O-ring included as a complete wet end kit
- Glass fiber reinforced polypropylene (GFRPP) construction for broad chemical resistance
- Rotating alumina ceramic spindle supported by a filled PTFE/PPS bearing for smooth, low-friction operation
- Direct-fit replacement engineered to original Iwaki MD-70RZ specifications
- Threaded G3/4 connection type for straightforward pipe integration
Applications
- Chemical transfer and process fluid handling
- Water treatment and filtration systems
- Laboratory and analytical instrument fluid circulation
- Electroplating and PCB manufacturing lines
- HVAC and air conditioning circulation loops
- General industrial recirculation and transfer applications
- Aquaculture, aquarium, and pond fluid circulation systems
- Light industrial OEM equipment requiring corrosion-resistant pumping
Specifications
- Compatible model: Iwaki MD-70RZ series magnetic drive pump
- Kit contents: front casing (1), rear casing (1), impeller (1), O-ring (1)
- Port size: G3/4 threaded inlet and outlet connection
- Casing and impeller material: glass fiber reinforced polypropylene (GFRPP)
- Spindle material: alumina ceramic
- Bearing material: PPS-filled fluororesin
- O-ring material: FKM (Viton) standard, EPDM optional
- Pump type: sealless, magnetically coupled centrifugal
- Liquid temperature range: 32°F to 176°F (0°C to 80°C)
- Maximum liquid viscosity: 30 mPa·s at 1.0 specific gravity
Frequently Asked Questions
Q: Is the L-MD-70RZM a complete pump or a repair part?
It's a liquid end repair kit, not a complete pump. It replaces only the wet end components of an existing MD-70RZ series pump, so the motor and mounting hardware stay in place.
Q: What tools or skills are needed to install this kit?
Most technicians can complete the swap with basic hand tools since the casings, impeller, and O-ring are designed to bolt and seat into the existing motor assembly without special equipment.
Q: Can this liquid end handle aggressive or corrosive chemicals?
The GFRPP construction offers solid resistance to many corrosive and aggressive fluids, though compatibility depends on the specific chemical and concentration, so checking a chemical compatibility guide before use is recommended.
Q: Does this kit work with hose connections instead of threaded pipe?
No, the RZM designation is the threaded connection version. A separate hose-connection liquid end is used for pumps built with barbed or hose-style ports.
Q: How do I know if my pump needs this liquid end replaced versus a full pump replacement?
If the motor still runs smoothly and only the wet end shows wear, leaking, or reduced flow, replacing just the liquid end is usually enough. A full pump replacement is typically only needed if the motor itself has failed.
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