{"product_id":"aquarium-co2-diffuser-diy-grass-tank-co2-external-refiner-plant-water-tank-system-generator-accessories-fish-tank-co2-diffuser","title":"Aquarium Air Pump One-Way Check Valves (2-Pack, Anti-Backflow)","description":"\u003ch2\u003e🐾 Product Overview\u003c\/h2\u003e\n\u003cp\u003eAquarium air pump one-way check valves — 2-pack, oxygen supply, anti-backflow for fish tanks — these one-way check valves prevent air line backflow in aquarium air pump systems, protecting the pump from water siphon damage and ensuring consistent airflow to air stones, sponge filters, and decorative air accessories. One-way check valves are passive safety devices installed in the air line between the pump and the tank — they allow air to flow from the pump into the tank but prevent water from traveling back up the air line to the pump, which can happen during power outages when the water pressure difference creates a siphon effect. The 2-pack provides one valve for each tank or air line in a multi-tank setup.\u003c\/p\u003e\n\n\u003ch2\u003e✨ Key Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🔒 \u003cstrong\u003eAnti-Backflow\u003c\/strong\u003e — Prevents water from siphoning back to the air pump.\u003c\/li\u003e\n\u003cli\u003e⚡ \u003cstrong\u003ePower Outage Safe\u003c\/strong\u003e — Protects pump during outages when siphon risk is highest.\u003c\/li\u003e\n\u003cli\u003e2️⃣ \u003cstrong\u003e2-Pack\u003c\/strong\u003e — Two valves for dual tank or multi-line setups.\u003c\/li\u003e\n\u003cli\u003e💨 \u003cstrong\u003eOne-Way\u003c\/strong\u003e — Allows air out, blocks water in — passive and reliable.\u003c\/li\u003e\n\u003cli\u003e🐟 \u003cstrong\u003eTank Protection\u003c\/strong\u003e — Prevents water spills from air pump backflow incidents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e📦 What's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2x One-way check valves for aquarium air lines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e📏 Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 2-pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e One-way check valve, anti-backflow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Passive safety device, air line compatible, power outage protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest for:\u003c\/strong\u003e All aquarium air pump setups, multi-tank systems, power-outage-prone locations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003e💖 Why You'll Love It\u003c\/h2\u003e\n\u003cp\u003eCheck valves are the inexpensive insurance policy that experienced aquarium hobbyists universally recommend after learning about siphon backflow the hard way — the scenario where a power outage causes water to travel back up the air line and either flood the air pump or, if the air line exit is above the water line, create a siphon that slowly drains the tank. A check valve installed in the air line a few inches above the tank rim costs almost nothing and prevents both failure modes completely. The 2-pack quantity serves the common setup of two tanks sharing an air pump, or provides a spare to keep on hand since check valves are the kind of small component whose absence is only noticed when the one installed fails and a replacement isn't immediately available.\u003c\/p\u003e\n\n\u003ch2\u003e🛒 Order Yours Today\u003c\/h2\u003e\n\u003cp\u003eAquarium air pump one-way check valves — 2-pack, anti-backflow. Order today! 🐾\u003c\/p\u003e","brand":"Pup Supplies","offers":[{"title":"W05-05-20mm","offer_id":52010135421226,"sku":"14:350853#W05-05-20mm","price":74.99,"currency_code":"USD","in_stock":true},{"title":"W05-05-12mm","offer_id":52010135453994,"sku":"14:29#W05-05-12mm","price":31.99,"currency_code":"USD","in_stock":true},{"title":"W05-05-16mm","offer_id":52010135486762,"sku":"14:193#W05-05-16mm","price":31.99,"currency_code":"USD","in_stock":true},{"title":"1 pcs","offer_id":52010135519530,"sku":"14:1063#1 pcs","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/5709\/7258\/files\/S26d6510b52a847caa9728b2dff6d2442X.webp?v=1782668837","url":"https:\/\/pupsuppliesstore.com\/products\/aquarium-co2-diffuser-diy-grass-tank-co2-external-refiner-plant-water-tank-system-generator-accessories-fish-tank-co2-diffuser","provider":"Pup Supplies","version":"1.0","type":"link"}