How to Install Compression Fitting on Plastic Tubing

How to Install Compression Fittings on Plastic Tubing

Compression fittings are a popular choice for joining plastic pipes and hoses due to their ease of installation and versatility. They come in various types such as male-to-male (M-M), female-to-female (F-F), and adapter fittings. Here’s a step-by-step guide on how to install compression fittings on plastic tubing:

Step 1: Prepare the Tube and Fitting

Before you begin, ensure that your plastic tube is clean and free from any debris or contaminants. Choose the appropriate compression fitting based on the size of the pipe or hose you want to connect. Measure accurately using a tape measure and mark the position where the fitting will be placed.

Step 2: Apply Lubricant

Apply a thin layer of silicone lubricant to both ends of the compression fitting and the inside of the plastic tube. This ensures a smooth and easy connection without air bubbles forming during installation.

Step 3: Insert the Fitting into the Tube

Carefully insert the fitting into the plastic tube until it reaches the marked position. Be gentle to avoid damaging the threads or the plastic material.

Step 4: Twist the Fitting

Twist the fitting clockwise while pulling gently at the same time to tighten it down. The tightening process should create a snug fit between the tube and the fitting. Over-tightening can cause damage to the plastic tube or the fitting itself.

Step 5: Remove Initial Looseness

After initial tightening, remove about half of the remaining thread length with pliers. This creates an even tighter seal when fully tightened.

Step 6: Finish Tightening

Gently pull the fitting back towards the original position slightly after removing the excess thread length. Then apply final pressure to complete the tightening process. Ensure all parts are securely fastened before disconnecting them.

Tips for Success:

• Use Clean Tools: Always use clean tools and lubricants to prevent contamination.
• Check Fitment Quality: Select high-quality compression fittings for optimal performance.
• Avoid Heat Exposure: Do not expose the fitting to extreme temperatures which could affect its sealing properties.
• Inspect After Installation: Check the joint for proper alignment and no signs of leakage immediately after installation.

By following these steps carefully, you can successfully install compression fittings on plastic tubing, ensuring reliable connections for years to come.