Moeller Three-Way Brass Valve, 3/8-Inch FNPT
Moeller Three-Way Brass Valve, 3/8-Inch FNPT — Product description
Moeller's three-way brass valve gives you a simple, reliable way to route flow between lines from a single point. It has three 3/8-inch female NPT ports and solid brass construction, so it stands up to the wet, salty life on the water. A clean choice when you need to switch a line without adding complexity to the run.
The Moeller three-way valve is a brass selector valve with three 3/8-inch female NPT ports. You mount it in a line, thread in your fittings, and turn the handle to send flow one way or the other. That's the whole job, and it does it without electronics, without power, and without much that can go wrong. For a boat, simple usually wins.
Brass is the reason this valve earns its spot. It shrugs off corrosion far better than plated steel, it won't crack the way some plastics do when a fitting gets over-torqued, and it handles the vibration and heat of an engine space without complaint. On the water, that matters. A valve tucked behind a tank or under a console isn't something you want to revisit every season, so the material doing the sealing needs to last.
The three-way design lets you route a single feed to one of two destinations, or draw from either of two sources into one line. Think switching between a main line and an auxiliary, isolating a line for service, or directing flow where you need it during a rig-up. The 3/8-inch female NPT threads are a common size, so most standard brass or bronze fittings and adapters will thread right in. Use a thread sealant rated for your fluid and snug the connections down properly.
Who's this for? Anybody rigging or repairing a line who wants a durable manual selector without over-building the system. It's a favorite for smaller boats where space is tight and you'd rather turn a handle than chase a wiring diagram. First-time owner or seasoned mechanic, the install is straightforward.
A couple of honest notes. This is a manual valve, so there's no remote or electric actuation. It's a single valve, not a kit, so you'll supply your own fittings and any mounting hardware. And always confirm the 3/8-inch NPT size and your fluid compatibility before you plumb it in. Get those right, and it's the kind of part you install once and forget about, which is exactly what you want out of a valve on a boat.
Key Features
- Three-way brass valve routes flow to either of two ports from a single feed, or draws from two sources into one line.
- Solid brass construction resists corrosion, vibration, and engine-space heat far better than plated steel or plastic.
- 3/8-inch female NPT (FNPT) ports thread onto common brass and bronze fittings and adapters.
- Manual handle operation, no power or wiring required.
- Single compact valve fits tight installations behind tanks or under the console.
Why Buy from NVN Marine
- Authorized Moeller reseller, full manufacturer warranty
- NMEA member and ABYC certified, advice from real boat techs
- Same-day shipping before 3 PM ET on in-stock items
- NY headquarters and Fort Lauderdale flagship retail store
Technical specifications
| Title | Three Way; 3/8 Inch NPT Female; Brass; Single |
|---|---|
| Brand | Moeller |
| Manufacturer Part Number | 033312-10 |
| UPC | 739729028582 |
| Material | Brass |
| Port Configuration | Three Way |
| Thread Size | 3/8 Inch NPT |
| Thread Type | Female (FNPT) |
| Quantity | Single |
Frequently asked questions
What size are the ports on this Moeller valve?
All three ports are 3/8-inch female NPT (FNPT). Standard brass or bronze fittings and adapters in that size will thread right in.
What is a three-way valve used for?
It routes flow between lines from one handle. You can send a single feed to either of two destinations, or draw from two sources into one line, which is handy for switching between a main and an auxiliary line or isolating a line for service.
What material is the valve made from?
Solid brass. It resists corrosion, handles vibration and heat, and holds up in an engine space better than plated steel or plastic.
Is this valve electric or manual?
It's fully manual. You turn the handle to direct flow. There's no power, wiring, or actuator involved.
Does it come with fittings or mounting hardware?
No. This is a single valve. You'll supply your own fittings, adapters, and any mounting hardware to suit your install.
What thread sealant should I use?
Use a thread sealant or tape rated for the fluid you're running and for NPT threads. Snug the fittings down properly and check for leaks before you rely on it.
