Discussion and Review of Tiffin Municipal Code Revisions – Preparation for Setting the Public Hearing — Tiffin City Code - DRAFT

CHAPTER 155 BUILDING CODES against backflow in accordance with the requirements of this section and the State Plumbing Code. The backflow preventor shall include a detector (water meter) unless the Fire Marshall approves an exception in consultation with the water supply utility. For connections to public waterworks systems, the water supply test used for design of fire protection systems shall be adjusted to account for seasonal and daily pressure fluctuation based on information from the water supply authority and as approved by the Fire Marshall.” 53. Amend Section 903.3.5.1 delete this section and replace with: “A single domestic and automatic fire sprinkler system water supply. If the City water provider requires a single domestic and automatic fire sprinkler system supply, then the water supply shall be split outside of the building and shall have a shutoff provided for the domestic service after the split outside of the building. The total domestic demand is required to be added to the fire sprinkler demand.” 54. Amend Section 903.3.5.2 delete this section. 55. Amend Section 903.3.5.3 add a new section to read as follows: “Water Supply Safety Margin: The fire sprinkler system hydraulically calculated demand per NFPA 13 or NFPA 13R including required hose stream allowances, and domestic water demand if required by Section 903.3.5.1 must be a minimum 10 percent, but not less than 5 psi below the water supply flow test curve, the flow test must have been conducted within 90 days of fire sprinkler plan submittal to the city and third- party reviewer (if applicable). The base of riser psi at the time of acceptance test shall also be 10 percent but not less than 5 psi above the most demanding hydraulically calculated pressure.” 56. Amend Section 903.4.1 delete exception number 5 without substitution. 57. Amend Section 903.4.3 delete the section and replace with: “Alarms. An approved weatherproof horn or strobe device shall be mounted directly above the fire department connection between seven and 10 feet in height above grade. The water-flow alarm device shall be activated by water flow equivalent to the flow of a single sprinkler of the smallest orifice size installed in the system. Approved and supervised audible visual notification appliances shall be installed throughout each level of the interior of the building as required by the Fire Marshall and NFPA 72. Where a fire alarm system is installed, actuation of the automatic sprinkler system shall actuate the building fire alarm system.” Exception: Automatic sprinkler system protecting one- and two-family dwellings. 58. Add a new Section 903.5.1 to read as follows: “Inspector’s Test Valve. An inspector’s test valve is required at the most remote location in each fire sprinkler system or tenant or floor control valve space, for use at the acceptance test and to remove air from the system after maintenance work is done on the system.” 59. Add a new Section 903.5.2 to read as follows: “Forward Flow Testing. Automatic sprinkler systems shall be provided with an external outlet to perform forward flow testing as required by NFPA 25. Control valve shall be supervised, signed as testing and have male threads.” 60. Add a new Section 903.7 to read as follows: CODE OF ORDINANCES, TIFFIN, IOWA - 1292 -