Zodiac - Air relief valve assembly - R0557201

Zodiac – Air relief valve assembly – R0557201

The Zodiac Air Relief Valve Assembly (R0557201) is a genuine OEM replacement component designed for use with Zodiac pool filtration and equipment systems. The air relief valve — sometimes referred to as a bleeder valve or manual air release valve — is a critical safety and maintenance component fitted to pool filter housings and related equipment. Its primary function is to release trapped air from the filter tank or system before and after operation, preventing pressure build-up that could otherwise reduce filtration efficiency or, in extreme cases, create unsafe operating conditions.

When air becomes trapped inside a filter vessel, it creates an air pocket that compresses under system pressure. This reduces the effective water volume inside the filter, diminishes flow rates, and can cause pressure gauge fluctuations or abnormal system behaviour. By opening the air relief valve, the operator safely vents this trapped air before full operating pressure is reached, ensuring the system runs as intended. This assembly is a direct replacement part, manufactured to Zodiac’s original specifications, ensuring compatibility and a reliable seal with no compromise to system integrity.

Technical characteristics and compatibility

The R0557201 assembly is referenced across multiple official Zodiac catalogues, including the 2018 and 2020 Zodiac Pool Care Equipment catalogues, confirming its long-standing role as a standard service part within the Zodiac range. As a complete assembly, it includes all components necessary for a straightforward replacement — meaning the technician or pool owner does not need to source individual sub-components separately.

The valve is designed to be hand-operated or tool-operated depending on the specific installation, allowing for controlled and deliberate air release. It is constructed to withstand the chemical environment typical of pool water systems, including exposure to chlorinated water and common pool treatment chemicals. The assembly interfaces directly with the filter tank body at the designated air release port, and installation typically requires no specialist tooling beyond basic hand tools. Always ensure the system pressure is fully relieved before removing or replacing this component.

Suitability and application

This replacement air relief valve assembly is intended for pool owners, service technicians, and installers working with Zodiac filtration equipment where the original valve has become worn, damaged, or is leaking. It is suitable for use in both residential and light commercial pool installations where Zodiac filtration units are deployed. Because this is a genuine Zodiac spare part carrying the original SKU R0557201, it is the recommended replacement to maintain warranty compliance and ensure correct fit with the original equipment.

If you are experiencing air in your filter system, reduced flow rates, or a faulty or dripping air release valve, replacing the complete assembly with this genuine part is the most reliable and cost-effective resolution. Always cross-reference your filter model and existing part number against R0557201 before ordering to confirm fitment.