PATIKIL RXZER23 Brass Pipe Couplers, 1/8" x 1/8" Female NPT, 2-Pack

When a pipe run needs a threaded join or a little more length, the fitting should match the connection already in place. The PATIKIL RXZER23 couplers have 1/8" x 1/8" female NPT threads for joining compatible threaded pipes, with brass construction for use in water, air, oil and gas systems. The set includes two couplers and PTFE tape for the connection.

Each coupler has a hex profile for tightening with a wrench, making it practical for installation or removal during plumbing and tubing work.

Who it’s for

These fittings are suited to maintenance and assembly tasks where two compatible threaded pipe ends need to be joined or a pipe run extended. Their 1/8" female NPT connections are the key selection detail: match the thread type and size to the pipes or fittings in your setup before installation. They can be used with copper, brass, steel or other tubing when the threaded connections are compatible.

The application range includes refrigeration, hydraulics, instrumentation, fuel, grease, air, water, oil and gas systems. For example, when extending a threaded line in an instrumentation setup, the coupler provides a direct joining point without changing the thread size. If the job instead calls for connecting different thread sizes, a reducer is a different fitting approach, this set is for a same-size connection.

Why it’s worth it

Brass is the central material advantage for this fitting: it is corrosion resistant, ductile at high temperatures and has low magnetic permeability. Its hardness and durable construction make it suitable for a range of line-connection tasks. The precisely formed threads are designed to support a reliable seal, while the hex shape gives a wrench a clear grip when tightening.

The two-piece set is useful when a project needs more than one connection or when keeping a matching spare on hand helps simplify a repair. PTFE tape is included for preparing the threaded joint. How much easier is a repair when the fittings and sealing tape are together in one set? Use the tape as part of the installation, then tighten the fitting with a wrench without overtightening.

What matters most

• Type: Brass pipe coupler
• Thread: 1/8" x 1/8" female NPT
• Material: Brass
• Set contents: 2 couplers and 1 PTFE tape
• Work temperature range: -65 to 250 F
• Maximum work pressure: 1200 PSI
• Installation: Screw onto compatible threaded pipe and tighten with a wrench

The stated pressure and temperature ranges help identify the specified working conditions for the fitting. Thread compatibility remains central: NPT thread type and size should match the connections being joined. During installation, avoid overtightening, which can damage fittings or contribute to leaks.

Before you decide

What thread connections does this coupler use? Each fitting has 1/8" x 1/8" female NPT threads. It is intended to join compatible threaded pipe ends, so match both thread size and type to your setup.

What comes in the set? The set contains two brass pipe couplers and one PTFE tape, providing fittings for two connection points along with tape for threaded-joint preparation.

How is it installed? Screw the fitting onto the threaded pipe and tighten it with a wrench. Use care not to overtighten, as this can damage the fitting or lead to leaks.

When it makes sense

Choose the PATIKIL RXZER23 when the task calls for a compact brass coupler with matching 1/8" female NPT ends, rather than a fitting that changes thread size. It brings together the connection format, wrench-ready hex profile and included PTFE tape for practical work on compatible water, air, oil, gas and other listed systems.