Versatile 4-Port Design: Includes Female POL & Male ACME Thread, Excess Flow Soft Nose POL, 1”-20 Male Throwaway Cylinder Thread, and ¼” Inverted Flare for multiple connections. Dual Functionality: Allows hookup of an auxiliary propane cylinder and connection of an additional propane appliance for extended convenience. Motorhome Compatibility: Designed exclusively for motorhomes with a permanently installed propane tank. Easy Inline Installation: Mounts between the supply and regulator for quick and secure setup. Durable Brass Construction: Heavy-duty material ensures long-lasting performance and reliability.