The first inequality means that the distance between x and c is greater than 0 and that x â  c, while the second indicates that x is within distance Î´ of c. Note that the above definition of a limit is true even if f(c) â  L. Indeed, the function f need not even be defined at c.
Once inside a hot water heater, however, Legionella bacteria multiplies and is conveyed through the household plumbing, where it may be inhaled in the aerosol mist that accompanies showering, bathing or even washing dishes in a sink. Very young children and elderly people are particularly at risk.
If the water heater is old and corroded, cleaning the sediment from the water and sanitizing by chlorination could cause the water heater to leak. Procedure for Sanitizing of Hot Water Heaters to Eliminate Odors. 1  1. Turn off the manual switch if the water heater is electric. 2  For gas heaters, turn the control to Pilot.