Clogged drain, but how did it ever work?

Maybe a clogged drain. Look at this. I don't see a drain out here at all. Is this it? I think that's it right there. Nasty. I'm gonna try to blow that out from the inside because um there's not a good way to vacuum that copper pipe outside was my drain. So well I could have could have unscrewed it at that flare. I didn't see that on this one so we could look outside. come back put some algae tablets in here all that gunk's out my drain i'm gonna put some algae tablets in that drain and we'll come check pressures when it starts running the size of this thing because that is the only filter i'll show you filters okay you see right here that's a 1442 that's a three and a half but this filter is a 12 by 24 so you multiply 288 12 by 24 12 times 24 equals 288 divide that by 144 filters big enough for a two ton and this right here is a three and a half showed on that one the filter being too small for the system way too small even though it's not close to freezing up that high static pressure is going to kill that ECM motor if it hasn't already is going to so um we're going to see if we can increase the filter size on this maybe add multiple add another return in the other part of the house and um right now just got to get her a filter