Pro-source 4926801613PRO Inline Check Valve 1/8 in Fnpt

Product Description

The PRO-SOURCE 4926801613PRO is a compact inline check valve designed to allow one-directional flow and prevent backflow in small-diameter piping systems. Built with an aluminum body, this valve connects via female NPT threads on both ends, making it straightforward to install in-line with existing pipe runs. At 1/8 inch pipe size, it is suited for low-flow control applications where space and weight are critical factors. A minimum operating pressure of 4 psi ensures reliable cracking and seating performance. Plumbers, HVAC technicians, and fluid-system assemblers working on instrument lines, control circuits, or small pneumatic and hydraulic runs will find this valve a direct-fit solution.

This check valve is intended for inline installation in 1/8 inch pipe systems where backflow prevention is required. Typical applications include pneumatic control lines, small hydraulic circuits, instrument air lines, and auxiliary fluid circuits found in light commercial and residential HVAC or plumbing systems. The FNPT x FNPT end connection integrates cleanly into threaded pipe assemblies without additional fittings. Its aluminum construction keeps the assembly lightweight while providing adequate corrosion resistance for dry or low-moisture service environments.

Key Features

• Inline check valve configuration prevents backflow in one-directional flow systems
• FNPT x FNPT end connections for direct threaded pipe installation
• Aluminum body construction for lightweight, compact fitment
• Minimum operating pressure of 4 psi for reliable valve actuation
• 1/8 inch pipe size suits small-diameter instrument and control lines
• Compact dimensions at 1.57 inches length and 0.55 inches width for tight-space installations

Compatibility

Designed as an OEM-style replacement or new-installation check valve for 1/8 inch FNPT threaded pipe systems in residential and light commercial plumbing, HVAC control lines, and pneumatic circuit applications.

Installation Notes

Installation should be performed by a licensed plumber or qualified technician following applicable IPC or local plumbing code requirements. Shut off and depressurize the system completely before removing or installing any check valve. Apply thread sealant tape or pipe compound to the male threads mating into this valve per standard practice. Verify flow direction before final assembly, as check valves are directional and will not function correctly if installed in reverse.