Powerfist 8552937, Руководство пользователя, Страница: 7 / 24

1/2 HP Cast Iron Sewage Pump
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8552937 V 3.04
2. Install the pump with ABS, PVC, polyethylene, or galvanized steel pipe. Use the proper
adapters to connect plastic pipe to the pump.
3. Install a check valve in the discharge line to prevent the backflow of liquid into the basin. The
check valve should be free-flow valve that will easily pass solids.
CAUTION! For the best performance when handling solids, install the check valve
horizontally or at an angle of no more than 45°. Do not install the check valve vertically
because solids may settle in the valve and prevent it from opening on start-up.
4. When using a check valve, drill a 1/8 in. (3.175 mm) or 3/16 in. (4.8 mm) diameter relief hole
in the discharge pipe below the floor line between the pump discharge and the check valve.
Otherwise, the pump could air lock and will not pump water even though the pump will run.
See figure 1.
Fig.3