In cases where the generators are supplied with water from city mains or house pipes, and where dangerous pressures might be built up, no direct pipe connection with the generator shall be permitted. In such cases the supply pipe shall terminate some distance above the regularly provided opening for filling, so that water can be observed as it enters the generator.
(Coun. J. 12-9-92, p. 25465; Amend Coun. J. 2-7-96, p. 15616)