P-Trap design -is this right. ..
New system installed-looking at the PVC pipe coming out of the unit it's straight then dips kinda u shape-but a straight piece is sticking straight up right before it makes the u dip...I watch some videos on utube that looks like mine and it looks like that is where u could use as a clean out to flush I guess if you had a clogged drain.. But it had PVC cap on top, you had to remove.. Here's my question my has NO cap and wher the system kicked on lots of air is blowing out the pipe into the attic..seems not right to me.. Hope I have explained enough to get some thoughts if this is correct ..I will try to take a picture later and post-if I can...thanks for helping