Our PB installed A&A mfg Quikskim venturi skimmers (2) on our new pool. They are advertised as being able to skim very efficiently even with pumps at low speed.
Our problem: They are not skimming at all! There is almost no water going across the weir. The weir door basically stays upright instead of being drawn downward by the flow of water into the skimmer, mainly because there is no flow into the skimmer.
We have a Pentair Intelliflo pump, running at 1850 RPM typically (higher during Polaris cleaning cycle). Valves are completely open on each of the 2 skimmers, about 15% open on the spa return, and 75% open on the pool return valve.
Does anyone have any ideas why the skimmers would not be functioning properly?