Simpleterrier
True BYH Addict
if the drain goes to clear air, why would one need a trap? I suppose someone might connect the drain to a sewage pipe, would want a trap then. But yeah, glue is good
The trap is for the negative pressure inside the drain of an air handler. The ac or heat pump coil is on the return side of the blower causing negative pressure in the drain pan water backs up cause air coming in drain pipe with a trap it can't. On a furnace ac or with the cool on the positive side of the blower it will drain cause air will be going same direction as water.
I know a few days late but figured I'd help out