{"product_id":"premium-ptfe-waterproof-breathable-vent-valve-gas-balance-exhaust-air-check-valve-fits-4mm-hose-diy-co2-fermentation","title":"Premium PTFE Waterproof Breathable Vent Valve | Gas Balance Exhaust Air Check Valve (Fits 4mm Hose) | DIY CO2 \u0026 Fermentation","description":"\u003cdiv style=\"background-color: #f8f9fa; padding: 10px; border-left: 4px solid #0056b3; margin-bottom: 20px;\"\u003e\u003cp style=\"margin: 0;\"\u003e\u003cem\u003e🔄 Building a DIY CO2 system? Pair these vent valves with our \u003cstrong\u003e\u003ca href=\"https:\/\/atradesen.com\/collections\/aquarium-diy\/products\/aquarium-diy-co2-generator-bottle-cap-adapter-soda-mineral-water-tube-connector-planted-tank-aquascaping\" style=\"color: #0056b3; text-decoration: underline;\"\u003eDIY CO2 Generator Bottle Cap Adapters\u003c\/a\u003e\u003c\/strong\u003e for a perfect airtight setup!\u003c\/em\u003e\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003ePremium PTFE Waterproof Breathable Vent Valve\u003c\/h2\u003e\u003cp\u003eProtect your sealed systems and balance internal air pressure safely with the Advanced Breathable Vent Valve from \u003cstrong\u003eAtradesen.com\u003c\/strong\u003e. 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!\u003c\/p\u003e\u003ch3\u003e🌟 Advanced Polymer Membrane Technology\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePTFE \u0026amp; FKM Construction:\u003c\/strong\u003e 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture \u0026amp; Pressure Balance:\u003c\/strong\u003e Automatically equalizes pressure differences between the inside and outside of a sealed container while preventing external moisture from contaminating your culture or fluids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Configurations:\u003c\/strong\u003e Available in 180° (Straight), 90° (Elbow), and 0° (Parallel) barbed designs to neatly organize your 4mm airline tubing in any tight space.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003e🚨 INSTALLATION \u0026amp; PRESSURE WARNINGS (CRUCIAL!)\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a specialized gas valve, NOT a standard liquid shut-off valve! Please read the Atradesen.com rules carefully:\u003c\/p\u003e\u003cul style=\"background-color: #f8d7da; padding: 15px 15px 15px 35px; border-radius: 5px; color: #721c24; border: 1px solid #f5c6cb;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e⚠️ DIRECTIONAL INSTALLATION (THE RED DOT):\u003c\/strong\u003e The side marked with the \u003cb\u003eRED DOT is the AIR INLET\u003c\/b\u003e. Gas flows strictly from the red dot side to the opposite side. If installed backward, the system will not vent!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e🚨 WATER PRESSURE WARNING:\u003c\/strong\u003e The PTFE membrane completely blocks \u003ci\u003eunpressurized\u003c\/i\u003e liquids and gravity drips. However, \u003cb\u003eif installed on a pressurized water line (like a water pump output), slight liquid leakage WILL occur!\u003c\/b\u003e Never use this to block pressurized water!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubing Sizing:\u003c\/strong\u003e The barbed nozzles are designed for a tight friction fit into standard silicone or vinyl soft hoses with an \u003cb\u003eInner Diameter (I.D.) of approximately 4mm (3\/16 inch)\u003c\/b\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Atradesen","offers":[{"title":"180° Straight Vent Valve","offer_id":56748874498214,"sku":null,"price":6.99,"currency_code":"USD","in_stock":true},{"title":"90° Elbow Vent Valve","offer_id":56748874530982,"sku":null,"price":6.99,"currency_code":"USD","in_stock":true},{"title":"0° Parallel Vent Valve","offer_id":56748874563750,"sku":null,"price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/2588\/6118\/files\/Premium_PTFE_Waterproof_Breathable_Vent_Valve_Gas_Balance_Exhaust_Air_Check_Valve_Fits_4mm_Hose_DIY_CO2_Fermentation_006.png?v=1783324262","url":"https:\/\/atradesen.com\/products\/premium-ptfe-waterproof-breathable-vent-valve-gas-balance-exhaust-air-check-valve-fits-4mm-hose-diy-co2-fermentation","provider":"Atradesen","version":"1.0","type":"link"}