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flow o f w ater in. the system , or other approved device as a protection against th eft, leakage or w aste o f w ater; (d ) that said system shall b e regularly in ­spected b y the underw riters having jurisdiction, who shall report to the D epartm ent any departure from the original specifications; (e ) that said system and the connected alarm shall at all tim es b e properly m aintained. A pp lication fo r such service shall be made upon the form provided b y the Departm ent w herein the applicant shall sp ecify the size and exact location o f the service and any special requirem ents o f the underw riters having jurisdiction, particularly as to class or typ e o f m aterials and fittings, depth o f cover, special protection, etc. U pon receip t o f the application properly filled out w ith the required inform ation, the Departm ent w ill determ ine the amount o f deposit w hich the applicant shall make, and upon the com pletion o f the w ork to the satisfaction o f the underw riters having jurisdic- <u tion, the D epartm ent w ill render a statem ent o f the actual cost o f all labor and m aterial and other ex­penses chargeable to the installation o f the service including excavation, pipe, valves, m eters, relaying o f pavem ents and ten per cent o f said costs fo r supervision and adm inistrative service, and w ill re­fu nd to the applicant an y amount deposited in ex­cess o f the costs as shown in said statement, or in the event that the cost should exceed the am ount o f the deposit, the applicant shall pay such additional cost. This rule is applicable only w ithin the C ity and County o f San F rancisco and such areas outside o f San F rancisco as m ay be specifically designated by the P u blic U tilities Commission, including the San F rancisco A irp ort property, w hich is hereby so desig­nated.* The D epartm ent assumes no lia b ility fo r damage due to interruption o f service, through autom atic sprinkler connections. * f ara* raph a® amended March 17, 1941. Resolution No. Rule 12a. M ain extension fo r sprinkler services. W here it is necessary to extend or lay a larger main to supply the sprinkler service required, such exten­sion w ill be done at the expense o f the applicant, credit being given fo r the cost o f any pipe and fit­tings replaced, and fo r an amount equal to fou r times the estim ated annual revenue from the pro­posed new sprinkler service. A deposit w ill be re­quired before undertaking the w ork and adjustm ent shall be made fo r any difference betw een the actual cost o f the w ork and the amount o f the deposit as provided under Rule 12. R ule 12b. L ocation o f services. The Departm ent re­serves the right to determine the size o f the service to be installed, and where the property to be served fronts on more than one street, to designate on which frontage service w ill be given. Rule 12c. Owners and agents must apply fo r service b efore exten din g house pipe. Owners, agents, archi­tects, builders, plumbers, and other prospective con ­sumers w ill first m ake application to the Service D ivision as to size and location o f services and meters required, b efore extending their house piping to the curb. Rule 12d. Services m ust conform to building and fire ordinances. Services, meters and house piping shall conform to the rules o f the P ublic U tilities Commission or the W ater Departm ent, to the B uild­ing and Fire Ordinances and to any legal require­ments o f the State Board o f H ealth or other au­th ority having jurisdiction. Rule 12e. Cross connections. A fte r August 1, 1933 no new cross connection or cross connections shall be’ made between the w ater pipes, in an y building or premises w hich are connected to the system o f the Departm ent, and any other source o f supply, w ithout first obtaining a w ritten perm it th erefor from the Departm ent. W herever a cross connection now exists between the w ater pipes in any building or premises, which are connected to the system o f the Departm ent and 12 13