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Add antifreeze to hot water heating systems, toilets, washing machines and sink traps
During February-June 2010, all drains were changed, eliminating the connection with the overflow drain; the overflow holes were decommissioned; the strainers in the sink basin were replaced by strainers containing a larger number of smaller holes to reduce backsplash; and sink traps were replaced.
You can also sink traps around the potatoes filled with beer or create barriers with grit or eggshell.