Ploy Union Coupling For Extending Standard Black Sump Pump Discharge Hose 1-1/4" or 1-1/2".  Finally someone made these to extend your standard sump pump discharge hose that comes out of your house.  You can't find them in any of the hardware stores, at least not around here, and there not on eBay.  They are designed to be pushed on and shouldn't come apart with normal sump pump pressure, I also use a couple of 2" hose clamps just to make sure.