Pay the $50, and have a Ďrealí plumber take a look...Should take him about ten minutes.
A friend owned a big printing company, he has a wonderful Heidelberg printer.... from Germany,,,,,One day it stopped working,,, he called the factory,,,$10,000 for a factory tech to fly over the next day,,,,the tech looked at it for a few minutes, took out his screwdriver,, turned one screw. Printer back in business. My friend goes ďWhat ,,?? I paid ten grand just to have you turn a screw?ííííí Tech answered,,,,No sir,, you paid ten grand to someone who knew WHICH way to turn the screw ď
Point is,, donít lose sleep over it,,, time to call in the pro.