Closing an open water pipe effectively involves stopping the flow of water safely and securely. The specific method depends on the pipe material and desired permanence. Here are several common methods:
Temporary Solutions
For temporary shutdowns or testing:
- Plastic Push-On Stop End: These are quick and easy to install. They push onto the open pipe end, gripping it to stop the flow. The provided video clip discusses these, and notes that they grip tightly to withstand water pressure.
Permanent Solutions
For permanently sealing a pipe:
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Cap (Soldered or Solvent-Welded):
- Copper Pipes: A copper cap can be soldered onto the open end of the pipe. This involves cleaning the pipe and the inside of the cap, applying flux, and heating the connection with a torch while applying solder.
- PVC/CPVC Pipes: A PVC or CPVC cap can be solvent-welded onto the pipe using primer and cement.
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Compression Cap: Compression fittings offer a mechanical seal. Slide the cap onto the pipe, then tighten the compression nut to compress the internal sleeve and create a watertight seal. These are useful for situations where soldering or solvent welding isn't practical or desired.
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SharkBite or Push-Fit Caps: Similar to the temporary push-on stop ends, but designed for permanent use. These caps create a watertight seal when pushed onto the pipe. They're easy to install and require no special tools.
General Steps for Closing a Water Pipe
Regardless of the method, follow these general steps (after shutting off the main water supply):
- Turn Off the Water: Crucially, turn off the main water supply to the pipe before attempting any work. This prevents flooding. The main shutoff valve is usually located near the water meter.
- Drain the Pipe: Open the lowest valve to drain any remaining water from the pipe to relieve pressure and prevent drips while working.
- Clean the Pipe End: Thoroughly clean the outside of the pipe end to ensure a good seal. Use sandpaper or a pipe cleaner specific to the pipe material.
- Install the Cap/Fitting: Select the appropriate capping method based on pipe material and permanence desired. Install according to the fitting manufacturer’s instructions.
- Test for Leaks: After installation, slowly turn the water supply back on and check for leaks at the cap/fitting. If leaks are present, tighten the connection or redo the capping process, ensuring the pipe is clean and the fitting is properly installed.
Important Considerations:
- Pipe Material: The method of closing the pipe depends on the pipe material (copper, PVC, CPVC, PEX, etc.). Ensure you use compatible materials and techniques.
- Local Codes: Always check and comply with local plumbing codes when making plumbing modifications.
