3/8' Inline Tube Tap Shut Off Ball Valve — Quick Fitting Connection for Aquarium, RO Water Filter, Reverse Osmosis Systems Control water flow quickly and reliably without removing tubing. This compact inline ball valve with a 3/8' quickconnect fitting makes installation and routine maintenance faster and safer for aquarium lines, reverse osmosis (RO) systems, and other small waterfiltration setups. Key benefits Instant shutoff without disconnecting lines: stop flow at the valve to service filters, cartridges, or perform tank work without draining or interrupting the entire system. Reduces leaks and spills: the inline quick fitting connection is designed for a secure, watertight seal when paired with standard 3/8' tubing. Saves time and effort: fast pushtoconnect installation and a simple quarterturn ball handle let you control flow quickly. Precise and dependable control: the ball valve provides a firm on/off action so you can reliably isolate sections of your plumbing. Core features and attributes Size: 3/8' inline tube connection — compatible with standard 3/8' tubing used in aquarium and RO systems. Connection type: quick fitting pushtoconnect design for easy, tool installation and removal. Function: inline shutoff ball valve for immediate control of water flow. Form factor: compact inline assembly that fits neatly into tight plumbing runs and filter systems. Operation: simple quarterturn valve for a clear open/closed position and low resistance flow when open. Why customers choose this valve Minimizes system downtime during maintenance by allowing local shutoff at the filter or appliance. Simplifies upgrades and filter changes — no need to unfasten multiple fittings or empty large reservoirs. Ideal for hobbyists and professionals who need a compact, reliable isolation valve for smalldiameter tubing systems. Common applications Aquarium plumbing: isolate the water feed to a tank or stripe of equipment when performing water changes, cleaning, or equipment swaps. Reverse osmosis (RO) and undersink water filters: install downstream of an RO unit or filter housing to shut off flow for membrane or cartridge replacement and leak checks. General smalldiameter water lines: suitable wherever 3/8' tubing is used for chilled water lines, ice makers, beverage systems, or other pointofuse water fixtures. Installation tips Use with compatible 3/8' tubing and follow the tube manufacturer's recommendations for insertion depth and support. For leak service, ensure tubing is cut squarely and fully inserted into the quickfit connection. Operate the valve by turning the lever a quarter turn to open or close; avoid excessive force. What this product delivers A straightforward inline shutoff solution for 3/8' tubing that improves the safety, convenience, and serviceability of aquarium and RO waterfilter systems. Easy to install and operate, it provides a reliable local shutoff point without changing your existing plumbing layout.