How To Clean Ac Drain Line In Attic. Be sure to use a minimum of 2 cups once or twice per year. Attach the end of your wet/dry vacuum to the end of the ac drain line.
This might clear any clogs located near the end of the drain line. Repeat this monthly for the best results. All primary ac condensation drain lines should have an extension or access point for flushing the line.
Since the ac system is typically located in the attic, it's very close to the plumbing vent that exits through your home's roof and some builders will simply tie the ac drain line into the plumbing vent (which rarely clogs).
Remove any stored belongings, clean up standing water, and check the extent of damages. Run it down the line as far as you can. Funnel or something with a narrow pouring spout; Be sure to use a minimum of 2 cups once or twice per year.