Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 & Fermentation
Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 & Fermentation
Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 & Fermentation
Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 & Fermentation
Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 & Fermentation
Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 & Fermentation
Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 & Fermentation

    Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 & Fermentation

    $6.99

    🔄 Building a DIY CO2 system? Pair these vent valves with our DIY CO2 Generator Bottle Cap Adapters for a perfect airtight setup!

    Premium PTFE Waterproof Breathable Vent Valve

    Protect your sealed systems and balance internal air pressure safely with the Advanced Breathable Vent Valve from Atradesen.com. Ideal for DIY aquarium CO2 generators, homebrew fermentation buckets, and sealed pipelines, this high-tech micro-valve acts as a one-way breather: it allows gases to pass freely with ultra-low resistance while completely isolating and blocking unpressurized water and vapor!

    🌟 Advanced Polymer Membrane Technology

    • PTFE & FKM Construction: Housed in a durable PP plastic shell, the core utilizes a medical-grade PTFE (Polytetrafluoroethylene) polymer membrane and premium FKM (Fluororubber) O-rings. It provides outstanding resistance to chemicals, aging, and extreme environments.
    • Moisture & Pressure Balance: Automatically equalizes pressure differences between the inside and outside of a sealed container while preventing external moisture from contaminating your culture or fluids.
    • Versatile Configurations: Available in 180° (Straight), 90° (Elbow), and 0° (Parallel) barbed designs to neatly organize your 4mm airline tubing in any tight space.

    🚨 INSTALLATION & PRESSURE WARNINGS (CRUCIAL!)

    This is a specialized gas valve, NOT a standard liquid shut-off valve! Please read the Atradesen.com rules carefully:

    • ⚠️ DIRECTIONAL INSTALLATION (THE RED DOT): The side marked with the RED DOT is the AIR INLET. Gas flows strictly from the red dot side to the opposite side. If installed backward, the system will not vent!
    • 🚨 WATER PRESSURE WARNING: The PTFE membrane completely blocks unpressurized liquids and gravity drips. However, if installed on a pressurized water line (like a water pump output), slight liquid leakage WILL occur! Never use this to block pressurized water!
    • Tubing Sizing: The barbed nozzles are designed for a tight friction fit into standard silicone or vinyl soft hoses with an Inner Diameter (I.D.) of approximately 4mm (3/16 inch).

    Get a Free Quote

    Thank you for your interest in Atradesen.

    We specialize in high-quality hardware fittings, PVC & UPVC pipe fittings, aquarium accessories, irrigation components, water filtration products, and industrial supplies.

    Whether you are purchasing a single item, placing a bulk order, or looking for OEM manufacturing, our professional sales team is ready to provide you with the most competitive quotation.

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    Why Choose Atradesen?

    Atradesen is committed to providing reliable products and professional services to customers worldwide.

    We work with wholesalers, distributors, retailers, contractors, aquarium stores, hardware stores, irrigation suppliers, and industrial buyers.

    Our advantages include:

    • Factory Direct Pricing

    • Strict Quality Control

    • OEM & ODM Manufacturing

    • Fast Global Shipping

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    • Secure Online Shopping


    Frequently Asked Questions

    How long does it take to receive a quotation?

    Our sales team usually replies within 24 business hours.


    Do you offer wholesale pricing?

    Yes.

    We provide special pricing for wholesalers, distributors, retailers and bulk purchases.


    Can you manufacture OEM products?

    Yes.

    OEM and ODM services are available.

    Custom logo, packaging and product modifications are supported.


    What is your Minimum Order Quantity (MOQ)?

    MOQ depends on the product.

    Please contact us for detailed information.


    Which countries do you ship to?

    We ship worldwide.

    Shipping methods include DHL, UPS, FedEx, EMS, Air Freight and Sea Freight.


    Contact Information

    Atradesen

    Website

    https://atradesen.com

    Email

    tradesencom@gmail.com

    Phone

    +86-152-6063-0787

    WhatsApp

    +86-152-6062-9033

    Business Hours

    Monday – Friday

    09:00 – 18:00 (UTC+8)


    Thank You

    Thank you for choosing Atradesen.

    We appreciate your inquiry and look forward to building a long-term business relationship with you.

    Our goal is to provide reliable products, competitive pricing and excellent customer service for customers around the world.

    🚚 Shipping Guarantee

    ✅ Flat Rate Shipping: $25 on orders below $300
    🎉 FREE Shipping on orders over $300
    📦 Processing Time: 1–3 Business Days
    🇺🇸 USA Delivery
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    7–15 business days (Standard)
    🌍 International Delivery
    5–8 business days (Free Shipping)
    8–15 business days (Standard)
    📍 Tracking Number Included
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