vacuum drain cleaner

i've been using this technique for years now and thought it was a good time to share it with you 2'' shower drain with a combination soap scum, hair and cleanser. turns into a very solid clog up to the trap. the trick is to scrape it off the walls of the pipe and suck it up so it doesn't plug the trap or beyond.
a 1.5'' x 16'' brass slip joint 90 and a 5 gallon ridgid bucket head vac.use the brass 90 to scrape the walls of the pipe while the vac sucks up the grit and hunks. this one also had the remnants of the 2'' built in test plug from 4 years ago.