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If you can’t unscrew your bathtub drain, it could be due to stripped post threads. The best way to handle this is to pull the stopper up while turning it. Eventually, you should see a screw set that you can loosen with a flathead screwdriver to remove the bathtub drain.

You should leave the water dripping when temperatures are below 20 degrees for three hours or longer or your power goes out in the winter. Leave the water dripping until temperatures are consistently above 20 degrees and you’ve checked for frozen pipes. With water movement in your pipes, ice is less likely to form, and your pipes are less likely to burst. The drip relieves pressure, preventing burst and leaking pipes.

Copper pipes are the safest type of pipe for carrying drinking water because they won't leach chemicals into your drinking water. However, for the best water quality, you should use copper pipes with lead-free joint material. The next best options for carrying drinking water are CPVC and PEX pipes.

If you use copper pipes for drinking water, you should check your water’s pH level. If it has a pH value lower than seven, you'll need to balance your water acidity with a purifier to avoid corrosion that could affect your drinking water quality. 

Replacing cast iron pipes when they’ve reached the end of their life span is key to preventing leaks and clogs. Over time, cast iron pipes corrode and experience pipe scale, which thickens the inside of the walls and increases the chance of clogs while also decreasing water flow. As the material deteriorates, you could experience costly leaks that increase reparation expenses. 

Cast iron can last between 50 and 75 years, but it’s still a good idea to check for leaks as your pipes approach the 25-year mark, as pipes can already show signs of deterioration within the first three decades.