Maytronics Dolphin Cainan 1 combined filter basket S1 - 9991465-ASSY

Maytronics Dolphin Cainan 1 combined filter basket S1

The Maytronics Dolphin combined filter basket S1 (9991465-ASSY) is a genuine assembly-level replacement filter basket designed for the S1 filter bay on Dolphin robotic pool cleaners. It combines two filtration grades in a single basket unit, capturing both coarse debris and finer particles in one pass without requiring the robot to be opened and re-configured mid-cycle.

How the combined filter basket works

The S1 combined basket uses a dual-layer filtration design: an outer coarse-mesh section traps leaves, insects and larger debris while an integrated inner fine-mesh section captures sand, algae spores and finer particulate matter. Both filter layers are housed in a single rigid basket assembly that slides into the S1 filter compartment and locks in place, keeping the full debris load contained until you are ready to empty it poolside.

Compatible Dolphin models

This basket is the correct S1-format part for a broad range of Dolphin robots, including the Dolphin Cainan 1, Dolphin S100, Dolphin T25, Dolphin Active 15, Dolphin PoolBot PB10, Dolphin PoolBot PB20, Dolphin PoolBot PB25, Dolphin Evolution 10, Dolphin Avalon 20, Dolphin IZZY CLIMB, Dolphin ENERGY C, Dolphin EX10, Dolphin FORMULA 20, Dolphin CLASSIC LIGHT, Dolphin Seamaster CL, Dolphin E10, Dolphin E20, Dolphin RUN 10, Dolphin RUN 20, Dolphin MR 10, Dolphin MR 20, Dolphin ZFUN, Dolphin Blue Maxi 10, Dolphin Blue Maxi 20, Dolphin POOLSTYLE, Dolphin POOLSTYLE PLUS, Dolphin POOLSTYLE ADVANCED, Dolphin SX 10, Dolphin SX 20, Dolphin SM 10, Dolphin SM 20, Dolphin FON 20, Dolphin Seamaster AG, Dolphin CARRERA 20, Dolphin Evolution 20, Dolphin HAMMER, Dolphin MAESTRO 10, Dolphin MAESTRO 20, Dolphin Mini Kart, Dolphin Evolution 25, Dolphin E25, Dolphin Liberty 200, Dolphin Liberty 300 and Dolphin S50. Always cross-reference your robot’s model number before ordering.

Signs the filter basket needs replacing

Replace this basket when you notice the mesh is torn, warped or has holes that allow fine debris to pass through back into the pool; when the basket frame is cracked or no longer seats and locks correctly in the filter compartment; or when suction noticeably drops during a cleaning cycle despite the basket having been emptied and rinsed. A damaged basket also reduces filtration efficiency and may allow fine sand or algae to re-enter the water.

Why genuine Maytronics matters

Aftermarket baskets are frequently manufactured from lower-grade plastics that warp under UV exposure and repeated poolside heat cycles, and mesh tolerances are rarely matched to Maytronics specifications. Genuine Maytronics parts are precision-moulded to fit the S1 filter bay exactly, maintaining the correct seal, the correct mesh grade and the structural rigidity needed for reliable daily operation. Using genuine parts also protects any remaining manufacturer warranty on your Dolphin robot.