Leaving hoses connected during water:- this plumbing error is cause by extreme laziness. Hoses can damage when left out all year. They can lead freezing.
Use of drain cleaner in excess: - not use too much drain cleaner. Drain cleaners are effective and safe.
Joining two different metals in piping: - Using two metals in joins can leads to corrosion. Corrosion can leads to leek.
Using Toilet as trash can:- Don’t make toilet a trash can. At the time of flushing if there is a improper item down the toilet , eventually can stop up everything in house.