Specialty Mfr 6904390 Manual Ball Valve 1/8 Inch Fnpt

Product Description

The SPECIALTY MFR 6904390 is a standard manual three-way ball valve designed for low-pressure fluid control in plumbing, HVAC, and light industrial piping systems. The body is constructed of polyvinylchloride (PVC), making it suitable for corrosive or chemical-resistant service where metal valves are not preferred. All three ports use female national pipe taper (FNPT) connections at 1/8 inch pipe size. The wedge-style handle provides a positive grip for open and close operation without tools. Buna-N seals provide reliable shutoff across a range of common fluids. Licensed plumbers and pipefitters are the typical installers.

This valve is suited for residential and light commercial applications where a compact three-way diverter or shutoff is needed in a small-diameter line. The 1/8 inch FNPT port size targets instrument lines, pilot lines, condensate drain taps, chemical feed systems, and similar low-flow service points. The PVC body keeps weight low and resists many acids and bases encountered in water treatment and pool chemical feed lines. Pool service technicians and HVAC hydronic technicians also encounter this valve size in bypass and sampling circuits.

Key Features

• Three-way FNPT x FNPT x FNPT port configuration for divert or mix service
• PVC body construction for corrosion resistance in chemical and water service
• Buna-N seals provide broad fluid compatibility including water and mild chemicals
• Wedge-style handle allows manual operation without additional tooling
• 1/8 inch pipe size fits instrument, pilot, and small-diameter service lines

Compatibility

Designed as an OEM-style replacement or direct-install manual ball valve for 1/8 inch FNPT threaded piping systems in plumbing, HVAC, pool, and light industrial applications.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable local plumbing codes and the IPC. Shut off and depressurize the line fully before threading the valve into place. Use appropriate thread sealant or PTFE tape on all FNPT connections and avoid over-tightening, which can crack the PVC body. Verify fluid and temperature compatibility with PVC and Buna-N before placing the valve in service.