I visited a Swedish forum and used Google Translate to read a review from one of the users who just received the unit. Here is the Google Translate of what he said about the WP40:
"Then I packed it up and put it in the tub. Writes no long review but it will be some pictures and personal comments. gasket, it was nothing special to say about. size, much like a Tunze 6105th Felt substantially built and CE marking are (European with spaces between C and E) Pleasantly surprised by the silicone spacers which they copied from the new tunzepumparna which of course helps a lot of vibration. controller, simple and logical with a "mode" button to switch between, low, high, wave1, wave2, wave3 and a sixth program I did not understand me yet. You select which program anyway you want then you can start turning the knob to set the interval. Got a 3-4cm wave at 20 seconds mixrande. I have not tested all these even when the kids would have had food again today .. But most of all .. It is QUIET as a tunze .. Marking no difference between it and my 6095 which to my ears is dead silent unless you put your ear to them. flow I think I can imagine that the 13,000 liters as it should be on the line when at least breathing down on a lot more than my 6095 which has been around 9500l as maximum flow. now we'll see if it holds in the long run as well. If it does so, it will be a tough match for the tunze and Vortech .."
The translation is a little rough but I think you can capture the essence of what he said.