Check valve/pump

Old 02-20-19, 08:08 AM
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Check valve/pump

I set up a outside temporary sump pump.The pipe only has 1 90 degre angle downhill about 8 or so inches above top of pump.
Since it is all downhill from there will i still need a checkvalve ? andif I need it is it best to install before or after the elbow that is at top?

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