<strong>Yahoo Message Number: 99997</strong>Hi Folks,<br/><br/>Recent posts covered the use of vinegar for cleaning calcium deposits from tanks and lines. <br/>However, the filter(s) internal to the plumbing lose the effectively if not removed before the use of either vinegar or bleach. <br/>As a side note, I have put 4 gallons of vinegar in my home hot water heater (first drained) over night once a year...