Hey Plumber, let's try to keep it kind of manly and Olde Spice around here? Chingus OK, maybe whazzit, but thingy? That Jerry Seinfeld sensitive metrosexual stuff is really contagious LOL. I had to go look at the Fox book before posting cause all I could think of was lever check. It does both--checks or locks and trips the lever. Actually I think it retards the rotary (sometimes called the gizmozus) from closing which in turn holds the lever over until the returning rib extension pushes it down or "trips" it.
jack
