Tech arrived and customer showed him to the downstairs common bathroom. She explained that her husband had tried to pull out hair from the trap however was unsuccessful. Tech ran water in shower as well as lav sink until water filled up shower, confirming that the problem was in the common line. Tech explained some options and possible cause, and was given authorization to snake the drain. Tech snaked the, drain pulling out a blockage of a mass of hair. Drain was re-snaked confirming that there was nothing residual in the line. Line was then tested extensively confirming that it was clear and flowing. Customer then asked tech to look at the kitchen sink. She explained that the water was shut off if too much pressure was applied, or if the spray nozzle was used. Tech explain to her that it was most likely a faulty diverter. Options were given to the customer for a repair to the faucet or replacement. Given the age and condition of the faucet customer opted to have the Fossett replaced