Value Brand
Value Brand 3/8" FNPT x MNPT Brass Mini Ball Valve Inline
A 3/8-inch nickel-plated brass mini ball valve rated for 250 psi water and 150 psi steam service
- TypeOther
- Quarter-turn shut-off with standard-port chrome-plated ball
- Nickel-plated brass body resists corrosion on air, water or steam lines
- Rated 250 psi operating pressure and 150 psi steam service
- Vacuum-tested to 29.9 in Hg for reliable sealing
- 3/8 in FNPT x MNPT threads install inline without adapters
3/8" Brass Mini Ball Valve
This nickel-plated brass mini ball valve provides inline shut-off for air, steam, and water lines. The two-piece straight body uses a chrome-plated brass ball with a standard port. It is rated for 250 psi maximum operating pressure and 150 psi for steam service. The valve connects via 3/8 inch FNPT inlet and MNPT outlet threads.
Replaces Larger Shut-Off Valves
The compact design fits tight plumbing spaces where a full-size ball valve cannot be installed. The quarter-turn handle allows quick manual operation without tools. The jump is worth it when you need reliable isolation in a confined area and the 250 psi pressure rating meets the system requirements.
Suits Residential and Light Commercial Plumbing
This valve suits installers needing a compact, manual two-way shut-off for standard fluid media. It is not rated for combustible gas service, so gas-line installers must look elsewhere. The product carries a California Proposition 65 warning for cancer and reproductive harm, which may restrict use in certain regulated environments.
Highlights
- Quarter-turn shut-off with standard-port chrome-plated ball
- Nickel-plated brass body resists corrosion on air, water or steam lines
- Rated 250 psi operating pressure and 150 psi steam service
- Vacuum-tested to 29.9 in Hg for reliable sealing
- 3/8 in FNPT x MNPT threads install inline without adapters
Specifications
| Brand | ZORO SELECT |
|---|---|
| Type | Other |
Questions about this item
What pipe threads does the 3/8" FNPT x MNPT brass mini ball valve require for inline mounting?
It needs a female 3/8" NPT thread on one side and a male 3/8" NPT thread on the other for straight inline installation.
How do I install the two-piece nickel-plated brass valve, and what step is often missed?
Apply thread sealant to the male NPT end, tighten with a wrench on the valve body flats — not the handle — then check for leaks at 250 psi max working pressure.
When should the chrome-plated brass ball or PTFE seats be replaced in this standard-port valve?
Replace if the handle turns stiffly, water seeps past the closed ball, or the valve no longer holds 29.9 in Hg vacuum during service checks.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.



