Is the Revo Clean system on the backwater long tails more or less a spiral groove just outside the seal that pushes debris out? Its a bit ambiguous what it is from looking a the pics on their site. We have some large trash pumps with a quasi labyrinth seal in front of the main seal packings. I somewhat assume its pretty much this type setup.

The other question is about the lower bearing housing. Does it have triple lip seals on the input and output sides of the bearing housing caps? or are the bearings triple lip seals? or Both? I see the o-rings on the caps but unless the shaft is sealed not much point to those. Again I couldn't tell from pics and no manual online.

I'm debating the merits of bushing versus roller bearing for the lowers, which I know has been debated on here quite a bit. The search for REvo Clean didn't turn up much either.

Thanks,
Matt

About 5 min after posting this, I found a pic on here that had a good explanation. That Figures...