Sanitize Fresh Tank & Bleach

wing_zealot wrote:
The recommendation is generally 100mg of chlorine for ever liter of water with a 3 hour contact time. (Reference AWWA C651). For you - What that means is you need approximately 5 oz of 8.25% bleach for 40 gallons of water with a 3 hour contact time.

That's pretty close to what I was thinking.

My owners manual says a 1/4 cup (2 ounces) of bleach for every 15 gallons of fresh tank size - with the 3 hour contact time as you say.

My fresh tank is 44 gallons - call it 45.

So I would use 3/4 cup (6 ounces) of "old fashioned" bleach.

With the more concentrated bleach, I was going to use 4 ounces per this math equation I remember from school:

6 oz of 8.25 bleach
equals
X oz of 5 bleach

X would be about 4 so about 4 oz.

I do one cup of regular chlorox per 50 gallons once a season fill and purge all lines and let stand in lines and tank for 24 hours. Drain and flush once. Always try to do it a minimum of a week before first trip of season to let any residule bleach evaporate out.

The recommendation is generally 100mg of chlorine for ever liter of water with a 3 hour contact time. (Reference AWWA C651). For you - What that means is you need approximately 5 oz of 8.25% bleach for 40 gallons of water with a 3 hour contact time.

I got this off the net....this is what I do... It's pool chlorine I got it from my local pool store...

Chlorinating Concentrate (Sodium Dichloro-s-Triazinetricone or Sodium Dichlor for short). Sodium Dichlor contains 62% available chlorine. Compare that to household bleach which has something close to 3%. One pound of Sodium Dichlor is equal to 8 gallons of bleach! Also, household bleach contains other stuff, including a lot of salt, and that salt and other stuff is what causes the bad taste and why you have to flush the fresh water tank so well.

It takes only 1 teaspoon of the concentrate per 100 gallons of water to initially sanitize the system. Remember to run water through all the faucets. It's okay to use the full teaspoon even on smaller tanks because you will be flushing the tank before adding the water you intend to drink but it seems wasteful.

Depending on tank size, adding a cup of bleach should suffice. Do a web search for sanitizing your potable water system. You will get dozens of hits. BTW Dollar Store I believe still sells the regular sruff for a dollar a gallon.