3) Class I manual dry standpipes are allowed in open parking garages that are subject to freezing temperatures, provided that the hose connections are located as required for Class II standpipes in accordance with Section 905.5. . Location required: 905.5 Location of Class II standpipe hose connections. • Semi-automatic--Dry. This standpipe type is connected to a permanent water supply capable of meeting flow and pressure requirements. It employs a valve (similar to a deluge valve) that releases water into the standpipe system when a remote operating device is operated. • Manual--Dry. This standpipe type is not connected to a permanent Manual dry standpipe system. Manual wet standpipe system. Semiautomatic dry standpipe system. Wet standpipe system. What is a standpipe system used for? Standpipe systems are designed to provide fire protection water for hose lines in strategically placed locations inside a building or structure. Some older buildings only have standpipe systems Class I manual dry standpipes is allowed in open parking garages subject to freezing that meeting the Class II requirements of 905.5. e. Class I standpipe is allowed in basements provided with automatic fire sprinklers. f. Class I allowed in buildings where the Class II portion shall not be utilized by trained personnel. 2. In a manual standpipe system the local fire department apparatus is used to provide the water supply to attain the required 100 psi at the remote standpipe outlet. Even in a system with an automatic supply, hydraulic calculations are required for the FDC as if it were a manual standpipe. Manual dry standpipe systems are essentially a system composed of empty pipe. Neither water nor pressurized air fills the pipe, which requires the fire department to arrive and supply both through the FDC. Inspection of standpipe systems should be conducted annually. It is very difficult, if not impossible, to inspect underground piping. The damage that may result in leaks is not always apparent in above-ground piping in manual dry, semiautomatic dry, and automatic dry standpipe systems, since they are not always filled with water. Manual-wet standpipe systems need water from a fire department pumper (or the like) to be pumped into the system in order to meet flow and pressure requirements. A u to m aic-D r y snd pe,f lw hz b of meeting flow and pressure requirements. It uses a device, such as a dry pipe valve, to admit water into the Manual Dry Standpipe system are exclusively for fire department use and require a fire department pumper to supply the need pressure and water supply through a fire department connection. Standpipe systems are designed to provide fire protection water for hose lines in strategically placed locations inside a building or structure. Some older requirements standpipe systems are limited to a maximum height of 275 ft. Those buildings over 275 ft in height will require the standpipe systems to be split in different zones. Class I and III standpipes shall be at least 4 inch in siz e, combined system standpipes shall be least 6 inch in size. The initial acceptance testing is very Manual Dry Standpipe; Wet Standpipe Systems . Wet standpipe systems have pressurized water at all times, when an outlet is opened water will immediately flow. This helps firefighters by not having to supply water and pressure to the system to get them to function. Automatic Dry Standpipe. Automatic Dry is a standpipe system that is connected to Criterion 736: