Maybe this is a known technique, but in searching for help I havenít seen it. I had a wash tub drain totally plugged. Nothing was draining. I took off the trap and cleaned it up, but it wasn't totally stopped up. The clog had to be further up the line.
I know that they have a device like a stick that has a handle, a can of compressed air, and a plug end with a hole in it. I see you put this over the drain and when you push the handle, compressed air shoots down through the plug hole and forces pressure through the pipes....hoping that it clears the blockage.
My son had my car, couldn't run to the hardware store to buy one.... so I thought, and came up with an idea that worked GREAT!
I drilled a hole in one sinkstopper and put it in one side of the tub. I put an undrilled stopper in the other side of the sink.
Filled both with some water.
Got compressor from garage.
Held my blow gun in the small hole of the stopper and held the other stoper into the drain, then pulled the trigger on the blow gun.
It didn't make a lot of noise.... till I did it once forgetting to hold down the other stopper....boy did that blow out.
Anyway..... a plugged up line i was working a few hours on was cleaned out! A new trick (for me) I am going to remember!