Brass Threaded Pipe Fittings 1/2" & 3/4" — Tee, Elbow, Joint, Cross, Cap & More

Measure the outer diameter of your pipe threads. A 1/2" NPT fitting typically has an outer thread diameter of approximately 0.840" (21.3mm), while a 3/4" NPT fitting is approximately 1.050" (26.7mm). When in doubt, match the fitting size to the pipe size stamped on your existing components or valves. If you're transitioning between sizes, choose one of the reducer variants (e.g., 3/4" Female × 1/2" Male Joint).

Yes. These brass fittings are generally manufactured to NPT (National Pipe Taper) thread standards, making them compatible with most standard US plumbing pipes, valves, and fixtures. NPT threads are tapered, which means they self-seal under pressure when assembled with PTFE tape. Always verify the thread type on your existing system before ordering — BSP threads (common in European systems) are not interchangeable with NPT.

Brass is naturally corrosion-resistant and generally performs well in damp, outdoor, and humid environments — making it a popular choice for garden irrigation fittings and outdoor water lines. For fully submerged applications or high-chlorine water systems, applying PTFE thread tape and checking local code requirements is recommended. In most cases, brass outperforms galvanized steel in corrosion resistance for water applications.

Brass threaded fittings of this type typically handle working pressures up to approximately 200 PSI for water and compressed-air applications at ambient temperature. Actual ratings can vary depending on the specific fitting geometry (e.g., tees and crosses are generally rated lower than straight joints) and wall thickness. Contact us to confirm the rating for your specific variant and application.

Male fittings have external (outside) threads that screw into a female port. Female fittings have internal (inside) threads that accept a male connector. Female-Male (F-M) fittings combine both ends on a single body, functioning as adapters or couplings between two different connection types. For example, a Female-Male Elbow lets you connect a female pipe end and redirect it 90° into a male outlet — useful when routing around obstacles.

Yes — for water or air lines, applying PTFE thread seal tape (commonly called plumber's tape) to the male threads before assembly is strongly recommended. Wrap the tape clockwise (when facing the thread end) 2–3 times before threading the fitting in. This ensures a leak-free connection and makes future disassembly easier without damaging the threads.

Use a standard Elbow fitting for a 90° directional change in open space. Choose a Seated Elbow when the fitting needs to sit flush against a wall or mounting surface. For a branching split in three directions, select a Tee (standard, Y-type, or corner depending on your layout). For a four-way split, a Cross fitting is the right choice. If you're simply capping off an open pipe end, use a Female Cap or Male Plug.