Yes, you can connect PVC pipe, but for a permanent, leak-free connection, gluing is essential.
While PVC pipes can fit together without adhesive, this is not a reliable method for creating a long-lasting, watertight seal. For plumbing and other applications where leaks are unacceptable, using PVC cement (also known as PVC solvent) is crucial.
Here's a breakdown:
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Friction Fit (Without Glue): PVC pipes can be pushed together, and sometimes this creates a snug fit initially. However, temperature changes, pressure fluctuations, and even slight movements can cause these connections to loosen over time, leading to leaks. This method is generally unsuitable for permanent installations.
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Gluing (With PVC Cement): PVC cement is not actually a glue in the traditional sense. It's a solvent that melts the surfaces of both the pipe and the fitting. When the two pieces are pressed together, the melted PVC fuses, creating a single, solid piece of plastic as the solvent evaporates. This creates a very strong and permanent bond.
- Process: The typical process involves:
- Cleaning the surfaces of both the pipe and fitting.
- Applying PVC primer.
- Applying PVC cement to both surfaces.
- Quickly joining the pipe and fitting with a twisting motion.
- Holding them together for a few seconds while the cement begins to set.
- Process: The typical process involves:
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Why Gluing is Necessary:
- Watertight Seal: The fused connection prevents water from seeping through.
- Pressure Resistance: Glued joints can withstand significant pressure.
- Durability: Properly glued PVC connections are highly durable and can last for many years.
- Permanence: The bond is so strong that the only way to separate the pieces is by cutting the pipe.
In summary, while a simple friction fit might seem adequate initially, gluing PVC pipe with PVC cement is the only reliable way to create a strong, durable, and leak-proof connection suitable for most applications.
