| In reference to my last post. The vibration caused by missallignment will load the bearings and lead to much shorter lives for both the bearings and the seals. My own Sequence has close to 10 years of continuous operation. That's not an exceptional life in industry. In the hobby I'm being led to believe pumps are replaced in 7 years, on average. Lots of that is due to pond redesign, I'm sure, but pump instalation by inexperienced people is also a contributer. I even see professional pond builders installing pumps improperly.
With the larger pumps, that have longer shafts coupling the motor to the pump, even operating the pump on the wrong part of it's curve will create bearing loading that can shorten the bearing's life.
I can't take issue with replacing a Sequence with an Artizan. Unless ongoing changes have caused a downgrading, both companies produce top quality. I would make the same comment if someone were replacing an Artizan with a Sequence. |