Its service life is more than 15 years. Besides, it needs to be clean from silt every year. Additionally, when digging the well walls are strengthened, raising the risk of collapse.
Eluiga on rohkem kui 15 aastat. Pealegi, see peab olema puhas muda igal aastal. Lisaks kui kaevamine hästi seinad on tugevdatud, tõstmine kokkuvarisemise oht.