Which oring? The one under the upper bearing must be there for proper operation. The one between the magnet and shaft is not used if you have the new one piece drive unit.
Scunan- I believe so, PM me your full name and I can check but by your user name I think that pump was repaired and returned yesterday.
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Roger Vitko
Tunze USA
"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"
Current Tank Info: 210 gallon planted tank with Altum Angelfish
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