Mr. B. scheduled his yearly filter change with us for his drinking water system. He also asked if we could check into the staining of the toilets. Garrett our tech, was scheduled to go to the home. He changed the yearly reverse osmosis filters and found the pressure tank for the system was bad. He was able to replace that as well. He also changed the maz filter and oring for the big blue filter housing. Garrett changed a few parts in the softener and ran a cycle through the system. Water then tested good. The staining in the toilet was caused by a leaky toilet.