Pentair | 25021-0101 | System 3 Air Bleed & Bulkhead Assembly | Filter Replacement

The Pentair 25021-0101 air bleed and bulkhead assembly is a replacement internal plumbing component designed for Sta-Rite System 3 pool and spa filtration systems. This assembly connects the internal air relief plumbing through the filter tank wall and allows trapped air to vent during startup and operation. Proper air removal helps maintain stable filtration pressure and supports efficient water circulation through the filter media.

────────────────────────────────────────

Key Features

• Replacement air bleed and bulkhead assembly designed for Sta-Rite System 3 pool and spa filter systems.
• Connects the internal air relief plumbing through the filter tank wall while maintaining a sealed bulkhead connection.
• Allows trapped air to vent from the filter tank during startup and normal operation.
• Helps maintain stable system pressure and balanced water circulation through the filter media.
• Durable molded construction resists pool chemicals, filtration pressure, and outdoor equipment environments.
• Ideal replacement component when air bleed assemblies become clogged, cracked, or worn.

────────────────────────────────────────

Product Overview

The Pentair 25021-0101 air bleed and bulkhead assembly is an essential internal plumbing component used in Sta-Rite System 3 filtration systems. Installed through the filter tank wall, the assembly connects the internal air bleed tube to the external air relief system, allowing trapped air to escape from the filtration chamber.

Air accumulation inside a filter tank can cause pressure fluctuations and reduce filtration efficiency. The air bleed assembly ensures that air is safely vented during system startup and operation, helping maintain consistent hydraulic flow through the filter elements. Replacing a worn or damaged assembly restores proper air relief function and supports reliable performance of the Sta-Rite System 3 pool filtration system.