How to connect two threaded pipes?

Connecting two threaded pipes requires proper alignment, sealing, and tightening to ensure a secure and leak-proof connection. This article will talk about how to connect two threaded pipes.

Steps to Connect Two Threaded Pipes

1. Prepare the Pipes

Clean the threads on both pipe ends using a wire brush or cloth.

Remove dirt, grease, or debris to ensure a proper seal.

2. Apply Thread Sealant

Use pipe thread sealant tape (commonly Teflon tape) or pipe joint compound (pipe dope).

Teflon Tape:

Wrap the tape around the male threads 2–3 times in the direction of the threading (clockwise as viewed from the pipe end).

Smooth the tape onto the threads to eliminate wrinkles.

Pipe Joint Compound:

Apply a thin, even layer to the male threads using a brush.

3. Align and Thread the Pipes

Align the male threads of one pipe with the female threads of the other.

Hand-tighten the connection by turning the male pipe clockwise into the female fitting.

4. Tighten the Connection

Use a pipe wrench or adjustable wrench to tighten the connection.

Hold the female pipe steady with one wrench.

Use another wrench to turn the male pipe.

Tighten until snug but avoid over-tightening, as it can damage the threads or fittings.

5. Check for Leaks

If the connection is for a pressurized system:

Turn on the water, gas, or fluid flow.

Inspect for leaks around the connection.

If leaks are present:

Disassemble, reapply sealant, and retighten.

Tips

For gas or high-pressure systems, always verify the sealant type is rated for the intended application.

If connecting pipes of different materials (e.g., steel to PVC), ensure the threads are compatible, or use a transition fitting.