My evaporator coil/air handler is located under my house. The drain line comes out and immediately goes 90 elbow, then a trap, then another 90 elbow before straight about 10 feet to the outside wall where it drains outside. There is a clean out T but I find it gets clogged before the clean out where the 90s and trap are located. What's the best way to redo this to make it easier to clean/drain? Is the trap even necessary?

Question from user mesa_back at hvacadvice at reddit.com.

Answer:

That's not a clean out, that's a vent. It just might need cleaning out. Looks damp down there and you have no safety switch to shut unit off on secondary drain so most likely leaking into your crawl space.

Answer from user BeRadford23 at hvacadvice at reddit.com.

simplify evaporator drain