[TommyT]

Help.... for the life of me I cannot remember what I'm suppose to pour into the Air Conditioner drain once a year to keep it flushed out. I've done a search and saw many, many posts about Bleach and other things, but I'm looking for a tried and true measure.

What do you use and at what mixture ????

TIA

[mulligan]

1 cup of bleach to 2 gallons of water

[red tail]

Originally Posted by mulligan

1 cup of bleach to 2 gallons of water

not entirely true. different mixtures for different systems. i have a carrier infinty system and they told me to use white vinegar and never bleach.

[downeaster]

Originally Posted by TommyT

Help.... for the life of me I cannot remember what I'm suppose to pour into the Air Conditioner drain once a year to keep it flushed out. I've done a search and saw many, many posts about Bleach and other things, but I'm looking for a tried and true measure.

What do you use and at what mixture ????

TIA

That is a question for you A/C contractor. Some say bleach, some say vinegar and mine says clear water.

[Fourpar]

Bleach is out. Used to be a standard practice, but the manufacturers found that the bleach tends to corrode metal in the HVAC unit over time. I used Vinegar for a while, but Munn's rep tells me to use only hot water. But, since I have them service it every 6 Months, I let the service guy do it! He uses water under pressure from my hose bib!

[jojo]

Del Air told me one gallon of hot water every six months.

[zummy]

you can put your shop vac on the outside drain to suck it out as well.

[saratogaman]

I, too, was confused by the bleach vs. vinegar thing.
I found "AC Line" at Home Depot. It is a biodegradable liquid in a white eight-ounce bottle. Use it four times a year. AC guy said that it's fine.

[Bill-n-Brillo]

I've always used hot water from the tap, enough til it flows good out the exit end of the pipe. That way I know I won't be harming anything!

Bill

[Hancle704]

I was told by two different HVAC Company Techs to not use bleach, but to use White Vinegar.

[getdul981]

I believe we were told to only use hot water.

[raynan]

Munns told us hot water, once a month.

[Bill-n-Brillo]

An addendum to my earlier response about using just hot tap water:

We used to have several house cats for a number of years (in OH) and found that we would get some amount of cat hair (from shedding) in the condensation drain pipe. If I didn't run hot water down the drain pipe on a fairly consistent/regular basis, it would clog due to the cat hair. Didn't have the best/tightest air filtration at our previous house and the air handler had a fairly small diameter drain pipe.......so there were several contributing factors to the clogging.

Moral: If you have pets that shed, you might have to do the drain cleaning on a more frequent basis.

Bill

[TommyT]

Thanks everyone for your reply... I really appreciate each one...

[rjn5656]

My a/c man told me hot water and dish soap.