Many sump pumps I know have polyamide casings/propellers and stainless steel shafts. Which did not prevent though (sump-pump behind washing maschine) the double O-ring bearing of the level-lever to fail and the motor to be drowned...
Foreseing a failure, and to enable a quick replacement, I installed a waterproof cable connector by a renown manufacturer into the mains lead in the sump bassin. Due to the constant wetness the polyamide parts, threaded casing and nut, seemingly swelled. Trying to untwist the nut finally spoiled the the whole connector.
I got mad on this.
Now I would use silicone grease on the thread. But... can one think of everything ahead??
Last edited by AgX; 11-03-2012 at 02:21 PM. Click to view previous post history.