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Preparation: Clean and Deburr the Pipe — Clean the Pipe and Fitting

Beginner4 hours

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How to Solder Copper Pipes for a Permanent, Watertight Joint · Step 4 of 9

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In this video

The first step is to thoroughly clean the surfaces of the copper pipe and the inside of the fitting that will be joined. Use sandpaper, an abrasive pad, or a wire brush to remove all oxidation and contaminants until the copper is bright and shiny. This is crucial for achieving proper wetting, which is the ability of the molten filler material to flow and bond to the surfaces. After cleaning, deburr the inside edge of the pipe using a round file or a dedicated deburring tool to remove any sharp edges left from cutting.

Goal: Prepare the Joint

  • The cleanliness of the pipe and fitting is one of the most important factors for a successful braze, as it directly affects 'wetting' and the flow of the filler metal.

Used in this video

  • Sandpaper — Cleaning the exterior of the copper pipe.
  • Wire Brush (brand: Belanger-UPT, Tool Type: Cleaning Tool) — Cleaning the interior of the copper fitting.
  • Round File — Deburring the inside of the cut copper pipe.
  • Copper Pipe (Pipe Material: Copper) — The pipe being brazed.
  • Copper Fitting (Fitting Material: Brass) — The fitting being joined to the pipe.
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FAQs

What type of torch is best for soldering copper pipes, and how do I know I'm applying enough heat?

The K Tool International Self Igniting Propane Torch Head is sufficient for most residential copper pipe soldering. You'll know you're applying enough heat when the pipe and fitting are hot enough to melt the Oatey Safe Flo Lead-Free Solder *by touching the pipe*, not the flame. The solder should then be drawn into the joint by capillary action.

What are the critical safety precautions I must take when soldering pipes indoors?

Always have a fire extinguisher nearby and remove any flammable materials from the work area, especially when using a torch. Ensure good ventilation to disperse solder fumes, and wear safety glasses to protect your eyes from splashes or heat. It's also crucial to turn off the main water supply before starting to avoid accidents and ensure pipes are dry.

Is it really necessary to deburr, ream, and thoroughly clean the pipes before soldering?

Absolutely. Deburring and reaming with a tool like the Husky 1-5/8 in. Inner/Outer Reamer ensures a smooth pipe interior for optimal water flow and prevents solder from being blocked. Thorough cleaning with sandpaper and applying Oatey H-20 Flux are critical to remove oxidation, allowing the solder to properly bond and create a strong, watertight seal.

What are the most common reasons a soldered joint might leak, and how can I avoid them?

Leaks often occur due to insufficient cleaning, inadequate heat application, or not using enough solder. Ensure pipes are shiny clean before applying Oatey H-20 Flux, heat the joint evenly until it can melt the solder, and feed enough solder to completely fill the joint. If a joint leaks, it must be desoldered, thoroughly cleaned, and resoldered.

Transcript
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In this demonstration, I'll be skipping this step. So the first thing that needs to be done is to clean our pipe and fitting. For the pipe, I either use some sand paper like this or just an abrasive pad. This step is very important. As proper wetting is somewhat influenced by the pipe and fittings cleanliness, wetting is the ability of a liquid to maintain contact with a solid surface, resulting from intermolecular interaction when the two are brought together. In other words, your filler material won't fuse properly if they aren't perfectly clean. Also, the birdie inside of the pipe, using either a round file or a dedicated pen ramer like this one.

Auto-generated transcript. May contain errors.