Press Fittings

Hiya, it’s Plumb—your favorite plumbing mascot with a heart of gold and a toolkit full of wisdom. Today, we’re diving into a classic plumbing essential: copper fittings. Whether you're a seasoned pro or a first-time fixer-upper, this one's for you.

So, what are copper fittings? Let’s start with the basics.

What Exactly Are Copper Fittings?
Copper fittings are the connectors used to join pieces of copper pipe together in a plumbing system. They're the elbows, tees, couplings, and adapters that help your water go where it's supposed to—without leaks or drama.

They're made from copper, a metal known for its strength, corrosion resistance, and ability to carry hot and cold water safely.

Think of copper fittings as the joints in a skeleton: they let everything bend, turn, and flow naturally.

What Types of Copper Fittings Are There?
Copper fittings come in many shapes and sizes. Here are the most common ones:

Elbows – Change direction (usually 45 or 90 degrees)

Tees – Split flow into three directions

Today, let’s dive into a topic that’s super important but often overlooked - threads. And no, I’m not talking about the latest social media buzz; I mean the kind that keeps your pipes nice and leak-free.

So, here’s a question I hear all the time: Are copper fittings NPT, or National Pipe Thread?

Quick answer? Some are, but honestly, most aren’t.

Let’s unpack this, thread by thread.

What Is NPT Anyway?
NPT stands for National Pipe Tapered Thread. It’s basically a standard we use here in the U.S. for threaded fittings in plumbing, gas lines, and air systems.

These threads are tapered, which means they get tighter as you screw them together. They’re designed to create a mechanical seal, often using good ol’ pipe tape or some thread sealant. You’ll typically find them in steel, brass, and plastic fittings.

Just a few keywords to keep in mind: NPT fitting, NPT pipe, NPT threads, check valve, globe valve, plug valve.

But here’s the kicker...

Most Copper Fittings Are Not NPT
Copper fittings? Well,