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The SPECIALTY MFR 3994790 is a standard manual ball valve designed for 1/4-inch barbed x barbed connections. The nylon body construction keeps the valve lightweight and resistant to many common chemicals and fluids found in HVAC, pool, and light plumbing service applications. A Viton seal provides reliable shutoff performance across a range of fluid types. The wedge-style handle gives technicians a firm grip for quick quarter-turn operation. This valve is a straightforward shutoff solution for low-pressure fluid lines where a barbed connection is specified.
This valve is suited for residential and light commercial service work where a compact, manually operated shutoff is needed on a 1/4-inch barbed line. Common install scenarios include pool equipment plumbing, chemical feed lines, condensate lines, and similar fluid-handling systems that use barbed tube fittings. The nylon body makes it appropriate for non-metal piping runs where corrosion resistance is a priority.
Designed as a standard manual ball valve replacement or new installation fitting for 1/4-inch barbed tubing connections in HVAC, pool, and fluid-handling systems.
Installation is typically performed by HVAC technicians, pool service professionals, or plumbers. Shut off flow and relieve system pressure before removing or installing any valve. Barbed fittings should be secured with an appropriate clamp to prevent hose pull-off under pressure. Follow applicable local plumbing codes and manufacturer guidelines for compatible tubing types and fluid service ratings.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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