I have been using Nahman for my many and varied plumbing problems for 20 years. I have always been pleased. Nahman stands behind its work. By now I must have met at least 10 different workmen and have always found them highly competent. I especially value their willingness to thoroughly explain what and why they are doing an installation or a procedure . And while their professional competence is the most important consideration in hiring them, I also place great importance on how utterly unbureaucratic the company is. That goes for the people who work the phones as well as the plumbers. Without exception they relate to the customer with respect and good cheer. I consider them one of the best long-time companies of any sort in Berkeley, a real asset to the community.