Dolphin m400 filter basket replacement

dolphinm400filter

Double-check before purchasing

M400 has had several production revisions — always confirm basket part number compatibility with your specific unit's production year

Compatibility

Replacement filter baskets for the Dolphin M400 are available as OEM Maytronics parts and from compatible third-party suppliers. The M400 supports both standard fine-mesh and ultra-fine-mesh filter baskets in the same chassis.

How to Verify Fit

M400 replacement baskets are larger than E-series baskets — confirm the listing specifies M400 or in-ground Dolphin models
Basket should slide into the top-load panel and latch without resistance
Mesh should be evenly tensioned with no tears — run your finger gently along the mesh to feel for any gaps

Common Mistakes to Avoid

Ordering E-series or above-ground Dolphin baskets — the M400 is an in-ground model and uses a larger basket that will not fit smaller above-ground models
Reusing a basket with a small mesh tear — fine debris passes through and stays in the pool
Not having a spare basket — without a spare, the robot is out of service while the single basket dries after cleaning

When to Replace

Rinse after every cycle. Replace when mesh shows any tearing or the frame warps. With regular cleaning, one basket typically lasts a full pool season.

Buying Tips

OEM Maytronics M400 filter baskets are the safest choice. Third-party options are available at lower cost — look for verified reviews and explicit M400 compatibility claims on the product listing.

Where to Buy

Find compatible replacement parts from these retailers:

Check price for dolphin filter on Amazon

Frequently Asked Questions

How many filter baskets does the Dolphin M400 hold?

The M400 uses two filter baskets loaded side by side in the top-load panel.

Are M400 filter baskets interchangeable with M600 baskets?

They may share a similar form factor, but verify explicitly — Dolphin has made multiple versions of both models and minor dimensional differences exist between versions.

How do I clean the Dolphin M400 filter basket?

Remove from the top-load panel and rinse with a garden hose on both sides. For stubborn debris, soak briefly in clean water and rinse again. Do not use a pressure washer.