Parker 90° Ball Valve, 1/4" NPTF x 3/8"T

The Parker 90-degree Ball Valve in 1/4" NPTF x 3/8" tube configuration gives you on/off flow control plus a built-in directional turn in one compact fitting. The 1/4" female NPT (NPTF) end threads onto a port, while the 3/8" tube side accepts push-to-connect tubing, and the integral ball valve lets you shut off flow with a simple quarter-turn of the handle. It carries the Parker Hannifin name for reliable fluid-system performance, combining several functions where space is at a premium.

• 90-degree ball valve with integral shutoff
• Connections: 1/4" female NPT (NPTF) x 3/8" tube
• Quarter-turn handle for fast, positive on/off control
• Combines a directional elbow and valve in one body
• Ideal for isolating RO and filtration components for service
• Compact design for tight installation spaces

An inline shutoff valve is invaluable in water-treatment plumbing. Placing one ahead of a filter, membrane, or fixture means you can isolate that component for maintenance without draining the entire system or shutting off the main supply. The 90-degree body adds the convenience of a built-in turn, saving you a separate elbow and tidying up the line routing in tight spaces such as under-sink cabinets and equipment racks.

To install, apply PTFE tape or thread sealant to the threaded connection, tighten it into its port without over-torquing the body, then push the 3/8" tube fully into the quick-connect side until it seats against the internal stop. Operate the valve by rotating the handle a quarter turn: in line with the flow is open, perpendicular is closed, giving you clear, positive control at a glance. The combination of threaded and quick-connect ends lets this valve bridge fixed plumbing and tubing in a single step. With Parker's proven design, this ball valve provides dependable isolation and control for residential and light-commercial water systems.

Keep a few of these combination valves in your kit for any project where you want both isolation and a directional turn in a single piece. Used throughout an RO or filtration layout, they make routine service dramatically easier, letting you shut off and reconnect individual components without disturbing the rest of the system.