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How Do Compression Fittings Work?

Compression fittings work by creating a tight, leak-proof seal with the pipe. The pipe is inserted into the compression fitting, which has a snug spot for the pipe to rest in. A compression ring (also called a ferrule) is then placed around the pipe inside the fitting. When you tighten the fitting's compression nut, it pushes the ferrule down onto the pipe. This causes the ferrule to compress around the pipe, creating a watertight seal. The seal is created without the need for glue or solder, relying solely on mechanical pressure.

Black Compression Fitting FAQs

What are the most common types of black compression fittings?

Some of the most common shapes of compression fittings are straight fittings, elbow fittings, tee fittings, and adaptor fittings. These fittings allow you to change directions, split a pipe into separate lines, or adapt one type of pipe or fitting to another. You can find each of these black irrigation pipe fittings at Sprinkler Warehouse.

What do the colors of compression fittings represent?

The colors of compression fittings often indicate the size compatibility of the fitting with specific types of poly tubing. Black is generally used for poly tubing with an outside diameter (OD) of 0.700 inches. Blue usually signifies a fit for poly tubing with an OD of 0.710 inches. This size may sometimes have a blue stripe on the tubing itself.

How do you undo compression fittings?

To remove a compression fitting, you’ll need to use a wrench to loosen the compression nut then unscrew it from the fitting. After the nut is removed, slide off the compression ring. If it's stuck or difficult to remove, feel free to cut it off, as compression rings can be replaced. Once the nut and ring are removed, the pipe should easily slide out of the fitting.