This Listing: https://www.ebay.com/itm/147289062404

This air intake assembly, also known as an air admittance valve or air check valve, is designed for water treatment systems that use air draw through a control valve brine intake.

The assembly allows controlled air entry during the air draw cycle, helping support oxidation processes used in filtration systems for iron and sulfur / rotten-egg odor treatment.

This item is a practical accessory for compatible filtration equipment where air intake is required through the valve’s brine port / injector circuit.

Key Features

• Controlled Air Intake: Allows air to enter the system under vacuum conditions during the air draw stage.
• One-Way Protection: Helps prevent water from exiting through the air line.
• Supports Oxidation: Helps form and maintain the air pocket used for iron and hydrogen sulfide (H₂S) treatment.
• Protective Mesh Filter: Helps prevent insects and debris from entering the air intake line.
• Pre-Designed Orientation: Assembly layout is already configured for proper one-way air intake operation.
• Simple Retrofit: Can be added to compatible systems using a control valve brine intake.

Compatibility

Compatible with any water treatment control valve that has a brine intake, also commonly referred to as a brine port or injector circuit.

Suitable for many air-draw filtration systems used for iron and sulfur / rotten-egg odor applications.

Assembly Includes

• 3/8" Tubing
• Adapter Fitting for connection to the brine intake port
• Check Valve — brass or stainless steel, depending on selected / supplied version
• Protective Mesh Filter to help block insects and debris

Important Operation Note

This component operates during the air draw stage, which is a specific phase within the overall regeneration cycle. Its function is limited to controlled air intake during the air draw phase only.

Installation Notes

• Connect the assembly to the control valve brine intake / brine port.
• Ensure all tubing and fitting connections are tight to maintain proper vacuum.
• Keep the air intake end protected from insects, dust, and debris.
• Proper performance depends on the condition of the injector, seals, drain flow, and internal system components.

Also Known As

• Air Intake Assembly
• Air Admittance Valve
• Air Check Valve
• Air Draw Assembly
• Air Injection Accessory

A compact and useful water treatment accessory designed to support controlled air draw operation in compatible filtration systems addressing iron and sulfur / rotten-egg odor issues.

🔒 Sealed Liquid Products

• Returns accepted only if the item is unopened, unused, and fully sealed.
• Each container is factory sealed and secured with an additional protective rubber cap.
• Opened, used, or tampered liquid products are not eligible for return.

📦 All Other Items

• Returns accepted only if the item is in original, unused condition.
• All original packaging, accessories, and components must be included.
• Used, altered, installed, or incomplete items may be rejected.
• All outgoing shipments are photographed, weighed, and video-documented.
• Returned items must match these records for a refund to be issued.

⚠️ Fraud Warning

Fraudulent returns — including product substitution, empty-box returns, or false damage claims — will be fully documented and reported to eBay, carriers, and relevant authorities.