To temporarily stop water flow when soldering copper pipe, a common DIY method involves using a bread plug.
Here's how:
- Create the Bread Plug: Peel the crust off a piece of bread and roll the soft interior into a tight ball. It should be doughy and dense.
- Insert the Plug: Push the bread ball into the copper pipe, positioning it upstream of where you need to solder.
- Solder the Joint: The bread plug will temporarily hold back any standing water, allowing you to effectively solder the joint.
- Flush the Pipe: Once the soldering is complete, turn the water back on. The bread plug will dissolve and flush out of the pipe.
Important Considerations:
- Water Pressure: This method is most effective for small amounts of residual water or low water pressure situations. For significant water flow or high pressure, other methods might be necessary (see below).
- Alternative Methods:
- Shut Off the Water Supply: The most reliable method is to shut off the main water supply to the affected area.
- Use a Wet/Dry Vacuum: A wet/dry vacuum can be used to suction out water from the pipe, although this may only work temporarily.
- Freeze the Pipe: In some cases, specialized pipe freezing kits can be used to temporarily freeze the water within the pipe, creating a solid barrier. This should be done with caution and by someone familiar with the procedure to avoid damaging the pipe.
Disclaimer: Using a bread plug is a DIY solution. While it can be effective for minor water leaks, it may not be suitable for all situations. Always exercise caution and consider the potential risks before attempting any plumbing repairs. If you are unsure about any aspect of the repair, consult a qualified plumber.
