The table below summarises the features of the models in the range.
Model
6000
10000
(750)
11000
(1/8 hp)
12000
(1/6 hp)
13000
(1/4 hp)
15000
(1/4+ hp)
Max flow (gph)
1320
2100
2450
2650
2950
3350
Wattage
75
95
185
210
235
260
Inlet
1.5" fbsp
1.5" fbsp
1.5" fbsp
1.5" fbsp
1.5" fbsp
1.5" fbsp
Outlet
2" fbsp
2" fbsp
1.5" fbsp
1.5"fbsp
1.5" fbsp
1.5" fbsp

I found that on internet that could interesting you; note that if you use two sequence 10000, you have a higher flow rate and you consume less electricity then if you take the 15000 unit, but you need a second skimmer ...
Hope that the graph pass on the thread.
Are we allowed to put the complete adress of a commercial adress on a thread ?
Marco