Hi all. Need some help figuring out the best way to blow out my main drain. Have already blown out all lines with my leaf blower, but couldn't get the main drain to bubble. I've since read that an air compressor is best, and that about 4 scfm of air volume at ~7psi is necessary to effectively blow out the line.
My problem is set up, because my returns from the pool are via large 3" pipes, and I understand that most are 1.5". I've included some photos.
I had intended on purchasing some rubber Winter Blow Out Plugs with Schrader valves, but I can't seem to find any in the size required (thinking #14).
Is there another option for blowing out the line? I just need to find or retrofit an adapter that can connect to the usual air compressor 1/4" fitting.