When the pump is switched on by the floater, how long does it run?

If there is merely water in the sump pit, you don't need this powerful a pump. This 3/4 HP pump is for handling major water flowing into the pit. When that happens in our cellar, the pump runs until it out-runs the flow of incoming water.-- sometimes for minutes sometimes for hours. We have 4 sump installations in 4 buildings. When the water table (level of the ground water in the outside ground) is high, three of these systems pump a lot of the time and pretty constantly. We have 2 pumps in each pit so if one fails we do not get flooded. Each Pump (if more than one in the system) needs to have a check valve/ back-flow preventer so it will force the other pumps to actually pump the water up and out and not allow an operating pump to to just pump back out through the other , (not then pumping) pump. The should also be placed at different levels so they don't necessariy go on at the same time, thus reserving one as a kind of back up. Of course, if there is really a lot of incoming water -- which we had when we first bought our house, it takes both pumps to handle the in flow and avoid flooding. NOw that we use the large diameter PVC piping, it works so much better that a single pump pof this size would probably be fine. It is best to pipe the pumps with real PVC pipe and in 1 1/2" or 2" size. This will increase the flow rate by around twice as much flow as the skinny (1 1/4") highresistance black curly-sided plastic pipe they often come with. Good luck and stay dry.

when you say 'top suction' does this mean the pu,p must be totally submerged?

The pump does NOT draw water directly from the bottom, as some have stated. If it did, it would draw in an dirt in the sump pit. The question was correctly answered already: “It (top suction) means the pump draws water from the top of the cast base vs. the underneath. Either way it is still drawing all the water from near the bottom of the sump basin. The top design just avoids sucking up dirt and sludge from the bottom of the sump basin. You can see the protected inlet screen built into the bottom black cast iron base. This is a good pump overall.”

how long is the power cord?

Just received my Wayne CDU980E. I, too, was concerned with this question. Power cord measures about 90-inches (7.5-feet) from where it connects to the top of the sump motor (which is about 11-inches above the bottom of the pump). I can't find this marked on Wayne's literature for the CDU980E.

Colour	Stainless steel
Material	Cast Iron, Stainless Steel
Style	Submersible
Power Source	Corded Electric
Item Weight	12 Pounds
Maximum Flow Rate	77 Gallons Per Minute
Maximum Lifting Height	5 Yards
Voltage	120 Volts
Global Trade Identification Number	00040066214744
Manufacturer	0
UPC	040066214744
Item model number	58321-WYN3
Product Dimensions	26.67 x 22.86 x 27.94 cm; 5.44 kg
ASIN	B00554SP3K

Wayne CDU980E 3/4 HP Stainless Steel Sump Pump with Vertical Float Switch

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