Zodiac - Compressor Z400 MD4 - R0812400

Zodiac – Compressor Z400 MD4 – R0812400

The Zodiac Compressor Z400 MD4 (SKU: R0812400) is a genuine OEM replacement compressor designed specifically for the Zodiac Z400 series automatic pool cleaners. As the core mechanical drive component, the compressor generates the pneumatic pressure and suction force that powers the cleaner’s movement and debris collection cycle. Replacing a worn or failed compressor with an authentic Zodiac part ensures the cleaner returns to its original performance specification, restoring reliable, consistent cleaning across the pool floor and walls.

This compressor is the MD4 variant within the Z400 compressor range, which also includes the MD5 (R0812500) and MD7 (R0812600) variants, each calibrated for different cleaner configurations. Using the correct MD variant is essential to match the internal mechanics and pressure output required by your specific Z400 model. The unit is engineered to Zodiac’s manufacturing tolerances, using materials and sealing components that match the original build quality of the cleaner, ensuring longevity and compatibility with the existing hose, diaphragm, and valve assembly.

Technical characteristics and compatibility

The Zodiac Z400 Compressor MD4 is an internal spare part intended to be fitted within the Z400 automatic pool cleaner housing. It functions as the pneumatic heart of the cleaner, converting electrical motor energy into pressurised air pulses that drive the cleaner’s locomotion mechanism. The MD4 designation refers to the specific motor and diaphragm configuration used in the compatible Z400 model variants — choosing the wrong MD variant can result in reduced suction, erratic movement, or mechanical incompatibility.

As a genuine Zodiac spare part, R0812400 is manufactured to exact OEM specifications, meaning no modification or adaptation is required during installation. It is designed for straightforward like-for-like replacement by a pool technician or competent pool owner familiar with the Z400 cleaner’s internal layout. Always confirm the MD variant of your existing compressor before ordering to ensure a direct fit.

Suitability and application

This compressor is suitable for swimming pool owners and service technicians maintaining a Zodiac Z400 series automatic pool cleaner that requires compressor replacement. It is appropriate for both residential and light commercial pool installations where the Z400 cleaner is deployed. The part is not a universal fit — it is specifically designed for compatible Z400 model variants using the MD4 compressor configuration. If your Z400 cleaner exhibits symptoms such as loss of movement, reduced suction, irregular random-pattern cleaning, or stops operating entirely, a failed compressor is a common cause and this genuine replacement part provides the correct solution for MD4-equipped units.