The pipe assembly is attached to the water pump and the water pumped in. At least two flow control valves should be installed. The operating valve, used routinely during emptying to start and stop flow, is located at the extreme end of the discharge pipe and directly above the receiving spreader. A safety or long-term shutoff valve is located in the outside slope of the storage dike, below the frost line. A well or enclosure may be needed for accessibility and operation of this safety valve.
Some valves interfere with flow enough to cause blockages.
If this is a concern, a safety valve may be installed at the intake of the discharge. This may require the construction of a dock for access to operate the valve. An angled gate valve with a long screw handle is also possible. A few manual or power-operated valves are available commercially . USDA Plan 6361, available from most state cooperative extension services, gives construction details for manual and hydraulic discharge valves and manual butterfly and vertical sliding safety valves.