Danner's for me...
I've got Danner Magdrive model 2 pumps in my systems. Both needed the pump chamber sealing with silicone sealant to stop water and air leaks, but the first one I bought has been running 24/7 uninterrupted for ten months, with no leaks or noise. The second one has yet to run in anger, but I expect the same level of performance from that one.
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