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Hook sumppump to gutter drain.
Well i did put a check valve in the i put a heavy duty sump pump in it and it requires you to put a check valve in it which i did.
Route the water into a storm drain or dry well.
Speak with your plumber about installing a sump pump which directs water away from your home to a nearby storm drain.
If the line gets clogged frozen or dysfunctional your sump pump will become useless sooner or later.
Sump pump discharge line underground is a vital part of the sump pump.
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The home pictured below had a downspout discharging directly into an underground yard drain that filled with ice and ended up leaking a lot of water in to the basement during the course of my inspection.
Simply cut your gutter extender at a 45 degree angle and connect it to your downspout with the zip hinge and 8 screws.
The performance of the discharge line dictates how the pump is going to perform or how long it s going to last.