195. The plumbing and drainage of buildings is regulated by law in many cities and towns. These regulations establish a standard of general excellence, to which all architects and plumbers must conform. The standard thus fixed is the lowest that will be tolerated, or that the public safety will permit. It is not the highest standard attainable, and does not aim to secure the best possible arrangement of drainage. The architect should carefully consider the arrangements, in every case, and should aim to supply the most perfect system of drainage and water supply that he can devise. He should not limit himself to the specific requirements of the law, but should do as much better as possible.