Although it has been proven by various studies, that algae, like plants, need sunlight to grow through the process of photosynthesis but now according to research, it has been found that algae often does not require complete sunlight for its optimal growth and that shading in specific directions can also allow the algae to grow well when other conditions such as water and nutrients are given in required amount. So, in the case of air conditioner condensate drain lines, cold water mixing with warmer water along with organic matter present in the dust allows algae to grow even in shading conditions. Another reason for the algae to grow in the ac drain line is that they are often open from the other end, which can allow a small amount of sunlight to pass through. This small amount of light can allow algae to grow in the pipe from where it passes.
Treatment of clogged condensate drains
The growth of algae leads to clogging and blocking of condensation lines, which often results in the overflow into the wall, ceiling, or floor of the house. The airflow and drainage get highly disturbed and should not be left untreated as overflowing condensate can even result in the growth of molds and mildews in the dry spaces. This can even lead to serious health issues.
The way to combat algae is with bleach. The old method has been to keep a jug of bleach near your unit and periodically pour a little bit down your drain line. But, you have to remember to do it!
The new method is the set and forget method. A way you can rest assured you will not have to worry about damage to your home. This method is to use chlorine tablets. How am I going to get chlorine tablets into my drain line? Hearnsberger Industries located in Louisiana designed a Chlorinator tube that easily installs in your condensate drain line. It houses a stack of 7 – 1 inch chlorine tablets like the ones currently mass produced for hot tubs. The tube allows only 1 tablet to be dissolved at a time. The tablets are very very slow dissolving and one stack of tablets will last you for months!
Head on over to Amazon or Ebay and order one today! You won’t regret it!
References
Chris Kuiken. Crwolfeheating.(retrieved February 10, 2015)
Shala Munroe. SFGATE.
Thibodeau, M, D. (2009). Algae: Made in the Shade. California State Science Fair.
Selvey Heating Blog. (retrieved July 13, 2012)
Trust Complete Air(retrieved October 1, 2020)