Parker Ball Valve, 3/8" Tube, Straight

Gain precise on/off control over a 3/8" tube line with the Parker Ball Valve, a straight-through tube x tube valve built from durable POM polymer. A quarter-turn of the handle opens or closes flow instantly, making it the ideal way to isolate a section of plumbing for service or to shut down a device without affecting the rest of your water-treatment system. From Parker Hannifin, it weighs just 0.07 lbs and installs with no tools.

Inline Shutoff, Simplified

Straight ball valves are among the most practical components you can add to a filtration setup. Position one upstream of a filter housing, RO membrane, or fixture, and you can stop flow to that component in an instant, then restore it just as quickly. There is no need to drain tanks or close a main supply line, which makes routine maintenance and cartridge changes far less disruptive to the rest of the household water supply.

• Straight tube x tube ball valve with push-to-connect ports
• POM polymer body resists corrosion and scaling
• Quarter-turn handle for positive on/off operation
• Smooth full-flow bore when open
• Tool-free tube installation on both ends
• Reusable connections for flexible plumbing

To install, square and deburr each tube end, then press the tubing fully into both quick-connect ports until seated against the internal seals. The collets lock the tubes under pressure, and a gentle tug confirms each side is holding. Operate the valve by turning the handle a quarter turn: aligned with the line means open, crosswise means closed, so the valve's state is always obvious at a glance. When fully open, the ball valve presents a smooth bore that keeps flow restriction minimal. Backed by Parker's reputation for fluid-control quality and built from corrosion-resistant acetal, this compact valve is a dependable choice for residential and light-commercial filtration plumbing.

For modular system builds, pairing this straight ball valve with matching Parker connectors, tees, and elbows lets you place shutoffs exactly where they are most useful. Add a few to your kit and you will always be ready to isolate a filter or fixture for fast, clean maintenance whenever the need arises.