Maytronics Dolphin Ex 45 CB black impeller with DC screw - 46662R0009

Maytronics Dolphin Ex 45 CB black impeller with DC screw

This is the genuine Maytronics black impeller supplied complete with its dedicated DC fixing screw, sourced directly for the Dolphin Ex 45 CB robotic pool cleaner. The impeller is the hydraulic heart of the pump unit: it draws water up through the robot and forces it through the filter cartridge or bag, carrying debris with it. Without a correctly functioning impeller, suction collapses and cleaning performance fails entirely.

Function and role in the pump circuit

Mounted directly onto the pump motor shaft inside the motor unit, the impeller generates the continuous water flow that underpins every cleaning cycle. Its rotating blades create negative pressure at the inlet port, pulling pool water — along with suspended debris, algae, and fine particles — up into the filtration chamber. The included DC screw locks the impeller axially to the motor shaft, preventing slip under load and ensuring consistent flow rate throughout the cycle.

Compatible Dolphin model

This part is specified as the correct impeller assembly for the Maytronics Dolphin Ex 45 CB. Maytronics produces two distinct impeller variants — black and yellow — and they are not interchangeable between model families. Always verify colour and part number before ordering, as fitting the wrong impeller will prevent the robot from operating correctly when submerged.

Symptoms that indicate replacement is needed

The most common cause of impeller failure is ingestion of hard debris — a small stone, twig fragment, or piece of tile grout — that chips or cracks one or more blades. Visible symptoms include a marked reduction in suction, the robot failing to pick up debris it would normally collect, audible rattling or vibration from the motor unit while running, or the cleaner not activating at all once submerged. Inspect the impeller whenever suction loss cannot be explained by a blocked filter.

Why genuine Maytronics parts matter

Aftermarket impellers may appear visually identical but are frequently moulded to looser tolerances, which reduces hydraulic efficiency and can accelerate wear on the motor shaft. Genuine Maytronics parts are manufactured to the exact specifications of the original component, ensuring correct blade geometry, secure screw engagement, and full compatibility with the motor unit in the Dolphin Ex 45 CB. Using a genuine part also preserves any remaining warranty coverage on the robot.