Maytronics Dolphin Ex 45 CB M Line ultra-fine filter panels (pack of 4) - 46662R0019

Maytronics Dolphin Ex 45 CB M Line ultra-fine filter panels (pack of 4)

This is a genuine Maytronics set of four ultra-fine filter panels designed for the M Line cartridge filter housing used in Dolphin robotic pool cleaners including the Ex 45 CB. The pleated ultra-fine filter medium traps fine particulate — including algae spores, fine sand and micro-debris — that a standard fine panel will pass straight through, leaving the water genuinely clear rather than merely visibly clean.

Function and filtration performance

Ultra-fine filter panels sit inside the M Line cartridge frame and act as the primary filtration barrier between your pool water and the robot’s impeller. The tightly pleated filter medium increases surface area compared to a flat fine panel, maintaining strong water throughput even as debris load builds up during a cleaning cycle. This makes them the correct choice for regular maintenance use when fine particle removal is the priority.

Compatible Dolphin models

These M Line ultra-fine panels are confirmed compatible with the Dolphin Ex 45 CB and are also used across a range of M Line platform robots including the Dolphin EX45, Evolution 40, Hydro 40, SF40, PS40, F40 and Swell M. Always verify your robot’s filter housing format before ordering — M Line panels are not interchangeable with S1 or S2 cartridge formats used on other Dolphin families.

When to replace

Replace the panels when cleaning cycles leave visible fine debris settled on the pool floor after the robot has finished, when suction noticeably weakens mid-cycle, or when the pleated material is visibly torn, discoloured or no longer recovers after rinsing. Under typical residential use, replacing the full set each season — or more frequently in pools with heavy algae or fine sand loading — is sound practice.

Why genuine Maytronics parts matter

Aftermarket ultra-fine panels frequently use a coarser or less dimensionally accurate filter medium that fails to seat correctly in the M Line frame, allowing unfiltered water to bypass the filtration stage entirely. Genuine Maytronics panels are manufactured to the exact pleat count, frame tolerance and filtration rating specified for this housing, ensuring the robot performs to its design specification and that your warranty position is not compromised.