Just replaced my water heater, 40 gallon gas. Since I rarely do plumbing I read the instructions. These were apparently written by A.O.Smith and improved by Lowes. The result is a good set of installation instructions with suggestions for accessory parts available at Lowes. They were written in clear, accurate English and applied to the heater I bought. They did not try to cover all models and did include helpful tips. Ex: 'shut off the old heater and run some water thru it'. This saved me from carrying many buckets of scalding water thru my house. I guess if you need instructions in another language you can ask for them, but the excess paper was not wasted. Also, codes and standards have changed. The instructions covered ventilation and air supply, etc. New methods and materials are now available. Good reasons to read the instructions.