My attic installed A/C has one drain from the pan under it, which is not the issue here. The A/C itsself has a "J" shaped trap of some sort, contructed of cast iron pipe about 1' out from the A/C. All other drain piping is flexible black plastic. Intake to trap is higher than output. About 6" beyond that is a capped plastic fitting which I have always used to induce bleach into pipe to preclude downstream fouling by build up. I can see that the trap would preclude backflow, but over time, it has filled with rust, becoming part of the problem vice part of the solution. Question: Is this "trap" called something so that I can go to an A/C parts dealer and get one? My guess is that the original trap was fabricated on site by the installer. Why he used cast iron pipe is beyond me. So, could I just build one up with "L's", etc. for an in-ground lawn sprinkling sytem, or even PVC---or is there some stupid code that dictates it be as it is?
- posted
19 years ago