cleaning drain lines in air conditioner?

Question

Is it OK to pour drano or similar products down the pvc drain lines of your a/c unit to keep them clean? Also is there any reason I should not install a "T" PVC joint where the drain lines come out of the unit so that I can do this w/out having to detach the drain lines to do maintenance?

Answer 1

You can pour dilute chlorine down the drain, once you have cleared the line. It is possible to blow out the line with compressed air, CO2 or the ole' fashioned tuba method.

You can install a clean out T in the line. They now manufacture a cleanable trap with a clear u joint so that you can monitor the drain. I'm not sure if is available at home stores, but you might be able to get one from a local company that installs HVAC equipment AND they sell over the counter.

If you go with PVC T, install with the T junction up and add a 6-inch riser. Pick up a tight-fitting cap for the top of the T. Don't use glue on the cap, just snug it up.

Answer 2

Tieger plumbing,

I would not add any chemicals capable of generating a lot of heat in a PVC drain line as the heat can distort the piping.

A clean out is always a great idea in any drainage system including condensate.

In lieu of chemicals to remove any build up one can use a 1/8 water jetter hose and flush out the lines scouring the inside to a like new condition.

Snaking would not be advised and many installers use under sized piping or short radius fittings

Answer 3

its ok for the pvc but i hate using chemicals to unclog drains. It normally just makes a clog, a toxic clog. Try compressed air or a water hose.

as for as installing a t you have to be carefull how you install it. there may be unintended outcomes depending on how you pipe it. What do you plan on the T doing?

Answer 4

Exellent answer to your own question. Also if it,s a window air conditioner try keeping the back tilted outside slightly. Rember water runs downhill.