{ "currentVersion": 10.61, "id": 19, "name": "Water Valves", "type": "Feature Layer", "description": "Types of ewsWaterValves:AV = AIR VALVEBS = BALL O' STOPBV = BUTTERFLY VALVECLV = CLOSED VALVECONN = CONNECTIONCV = CONTROL VALVEDSHV = DOUBLE STANDARD HYDRANT VALVEDAV = DOUBLE AIR VALVEMCV = MAGNETIC CLOSED VALVE NRV = NONE RETURN VALVERV = REFLUX VALVESHV = STANDARD HYDRANT VALVESV = SCOUR VALVEV = VALVE\u2022 Air Valve / Double Air Valverelieve the pipe system of trapped air or vacuums and to let air into the pipe.\u2022 Ballo'Stop valvesare flow valves that are quarter-turn and straight through apparatuses. These valves allow for shut-off and/or purposes of control.\u2022 Butterfly Valveis a valve which can be used for isolating or for flow regulation in large pipe diameters.\u2022 Control Valveregulates the flow or pressure of the water. Flow can either be increased or decreased. Flow control valves are usually automated and are used for example, to control the flow of water into a reservoir. \u2022 Non Return Valvepermits the flow of water in only one direction. As they prevent the reverse flow of water from the downstream section of a pipe to the pipe upstream of the valve; helping to protect equipment and processes.\u2022 Refux Valveis used in the suction line of the pumping system to prevent the backflow, when the pump is at the rest.\u2022 Standard Hydrant Valvesallows you to provide water to the fire at hydrant pressure, while waiting for a second pumper to hook up and increase flow and pressure.\u2022 Scour Valvesare located at low points or between valved sections of the pipeline. Their function is to allow periodic flushing of the lines to remove sediment.\u2022 Valvesare used for shutting off infrastructure such as air valves from the network, for the purpose of undertaking maintenance or repair on the asset. 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