Pentair Chemical Resistant Lid | Dynamo Aboveground Pump | 354113

The Pentair Chemical Resistant Lid (354113) is the OEM replacement pump lid for the Dynamo aboveground swimming pool pump. The pump lid seals the strainer basket housing, allowing you to access the basket for debris removal while maintaining a watertight closure during operation. A chemically resistant formulation protects the lid from degradation caused by chlorine and other pool water chemicals, extending service life compared to standard lids. When the lid cracks, warps, or no longer holds a proper seal, water loss and loss of prime are the typical results — this is the direct OEM replacement to restore proper function.

Specifications

Fits Into

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.

Pro Tip

The Dynamo pump lid O-ring is a separate serviceable part — if the lid is cracked or has lost its seal, inspect the O-ring at the same time and replace it if it shows any flattening, cracking, or brittleness. Replacing both together while the pump is already open avoids a second service call for a component that typically fails around the same interval.