Based on the provided reference, the video discusses using a PVC expansion coupling and mentions cutting between specific lengths to accommodate expansion. Here's a breakdown of a general approach to installing a PVC expansion coupling, though specific steps might vary depending on the manufacturer and application:
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Measure and Cut: Determine the length of PVC pipe needed between the two fixed points where you'll install the expansion coupling. The video mentions a cutting range (e.g., between 10 and 7 inches for a one-inch fitting), indicating there's a minimum and maximum length allowed to accommodate the expected expansion. Cut the pipe accordingly. Be precise with your measurements and cuts. A hacksaw can be used for cutting.
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Prepare the Pipe Ends: Deburr and chamfer the cut ends of the PVC pipe. This creates a smooth surface for proper insertion into the expansion coupling and helps prevent damage to the O-rings or seals.
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Apply PVC Cement (if required): Some expansion couplings require solvent welding (using PVC cement) to connect the pipe. Follow the manufacturer's instructions carefully. Apply primer to both the pipe end and the inside of the coupling socket, and then apply PVC cement to both surfaces.
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Insert the Pipe: Insert the PVC pipe into the expansion coupling socket, twisting slightly to ensure even distribution of the cement (if used). Push the pipe in fully to the depth indicated by the manufacturer.
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Allow Cement to Cure (if applicable): If you used PVC cement, allow sufficient time for the joint to cure before applying pressure or stress to the pipe. Refer to the cement manufacturer's instructions for curing times.
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Secure the Coupling (if required): Some expansion couplings may have features like set screws or clamps to further secure the connection. Ensure these are properly tightened according to the manufacturer's recommendations.
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Test the Connection: Once the installation is complete, test the connection for leaks and ensure the expansion coupling can move freely within its designed range.
Important Considerations:
- Manufacturer's Instructions: Always refer to the specific installation instructions provided by the manufacturer of the expansion coupling you are using. Different models may have different requirements.
- Application: Consider the application and the amount of expansion expected in the PVC pipe. Choose an expansion coupling with sufficient travel to accommodate the anticipated movement.
- Proper Support: Ensure the PVC pipe is properly supported to prevent excessive stress on the expansion coupling.
