The only drawback: The clamping ring of the lid is a disaster. If you take the pump in winter apart and back together in the spring which is always a force without equal. The opening of the clamping ring is still relatively easy. The closing is only possible with the aid of a tube, which is placed as a lever extension on the handle of the clamping ring. However, it must be taken care of: The handle of the clamping ring still flexes slightly and closed the ring then not yet. Without tube extension, it is hard to create and always carries the risk that the sudden snapping the fingers between the first and bathing experience is now delayed by a stay in the emergency room of the local hospital. -> Stupid
Who now asks why does the deal that thing every winter, let me tell you that I also did not think it necessary for the first year. Simply the drain plug (3 "s" - how stupid) out and rotate well. Forget it! The water, which is far from all there comes out. The sand has so much moisture that it is enough to bring the tub to burst at Frost. And each year, about 50, - for 'nen new vat are me then too. In addition, one is again facing the same problem with the assembly :-) And maybe you want him some day change the sand, and then also need to the clamping ring.
Conclusion: Except for the problem with the clamping ring a peak pump for relatively little money compared to prices in the swimming pool dealers. I would buy this model again and again. Possibly has indeed the manufacturer and reworked models with clock donated a slightly different / simpler locking technology. Would be desirable.