One method for dissolving calcium deposits is to use a mixture of vinegar and water. Another method is to use a combination of vinegar and baking soda, according to Made Man.
Using a solution of one part vinegar and one part water is great for cleaning calcium deposits on bathtubs, sinks and other household areas. For cleaning calcium deposits from a faucet, soak a paper towel in vinegar and wrap it around the faucet, instructs Made Man. Let it sit for an hour and then wipe the faucet clean.
Remove calcium deposits from drains by pouring a small portion of vinegar down the drain followed by a teaspoon of baking soda. Let this mixture sit for five minutes and then run some water down the pipes, says Made Man. Serious calcium build ups sometimes require chemical cleaners. When using a chemical agent to remove calcium from pipes, make sure the cleaner does not get into the holding tank.
Tio remove calcium from a shower head, take the head apart and clean all parts with a vinegar and water solution. Put the pieces back together and give the shower a test run to make sure it is clean enough, advises Made Man.