• <br />• <br />necessary. Although some jurisdictions may <br />require that valves be low enough to reach without <br />a ladder, all minimum height requirements for <br />obstructions must be followed. <br />Valves for testing and draining purposes should <br />also be labeled. This will prevent any potential <br />confusion. <br />Exterior valves should be placed in locations <br />accessible even during a fire incident. Wall-mount- <br />ed valves should be positioned no higher than 5 <br />feet above grade (ground level) and located at least <br />40 feet from 'openings such as windows, doors, or <br />AO-10 ORY <br />S'TANO PIPE <br />1 <br />Nut <br />PI . <br />- I 'SIM OFF VIM <br />(Fig. 3.3) Exterior sign show- <br />ing valve location (in this case <br />for a standpipe system). <br />Considerations -Water Supply Control Valves <br />■ Label all valves for specific use or area cov- <br />ered. <br />■ Provide diagrams to show boundaries <br />between zones. <br />■ Locate interior valves in enclosed stairs <br />wherever possible. <br />■ Provide signage for valves that are outside <br />stairs or in concealed spaces. <br />■ Provide exterior signs showing the location <br />of interior valves. <br />■ Locate exterior post indicator valves 40 feet <br />from the building. <br />■ Locate exterior wall-mounted valves 40 feet <br />from openings and within 5 feet of grade. <br />• <br />So <br />vents (Figure 3.4). Post indicator valves should be <br />at least 40 feet from the buildings they serve. The <br />40 foot distance is called for in NFPA 24. <br />Designers should require proper notification <br />when their designs require systems, or portions of <br />systems, to be temporarily shut off. This would typ- <br />ically occur during system alterations, or phased <br />installations. In these instances, the design docu- <br />ments should require notification of any system <br />impairments to the responsible fire service organi- <br />zation and coordination with the fire service about <br />any requirements that these impairments may entail. <br />OSHA <br />Occupational Safety and <br />Health Administration <br />146 <br />(Fig. 3.4) Wall control valve next to window. Fire issuing <br />from this window could prevent access to the valve. <br />