Area drain jetting. We can attempt to clear line for up to 3 hrs. If it still does not open up then go from there on other options. 1” regulator replace. Tankless flush service. Kohler shower cartridge. Need to remove trim and see what cartridge it is, then find that cartridge. Additional charge will apply to replace cartridge. Hydro jetted the bigger square drain in front of stairs. Was not able to jet far, ran camera down and could not see as there was mud in line. Possibly roots from palm tree that are in line. Recommend having it rerouted by a landscaping company. Jetted the other line by front of house all the way out to drive way exit point. Flushed the tankless unit for 1 hour and inspected. Replaced 1” regulator. Replaced the internal cartridge parts of master shower Kohler brand. Now there is cold/warm/hot coming out of it. Had client test and was happy with results.