Chihiros Dosing Flow Adapter is made of durable aluminium alloy, this adapter connects directly to the filter canister’s water pipe and supports installation of 4 dosing ports, each equipped with a check valve, making it perfectly compatible with our Dosing Pump system. Equipped with a one-way valve, it prevents water leakage even when the dosing tube is not installed. Available in two sizes, 12/16mm and 16/22mm, to fit different filter pipe dimensions. Freshwater use