Check Valve 1/4" Flare (Inlet) x FeFlare (Outlet) Plastic Corny Keg Gas Connector

The P470D-4F4 (aka 40 27-3010-00) is a durable, plastic or stainless steel double-ball check valve designed specifically for post-mix beverage systems and Corny keg setups. It features a male flare inlet and a female flare outlet. Disconnect Check Valve mounts onto the gas in coupler to protect your system from unwanted back-flow, ensuring gas is the only thing flowing.
These valves are built to protect the potable water supply from acidic carbonated water and backflow. It operates automatically without handles or stems, utilizing internal balls that seat securely against the flow direction to prevent leaks and prevent beverages or gas from backing up into the main line.
Key Product Details;

• Purpose: Specifically engineered to prevent liquids from spraying out of the gas port or backing up directly into your keg system.
• Material: Built from a durable plastic composition.
• Applications: Ideal for homebrew and commercial setups dispensing Nitro coffee, cold brew, craft beer, wine, cider, kombucha, and post-mix soda.
• Integration: Commonly used inline with standard Cornelius (Corny) keg disconnects. The manufacturer explicitly recommends using nylon flare gaskets to maintain a proper leak-proof seal.