Client/family friend broke part of the PVC nub on the septic flow diversion valve for their drain field. (The nub used with the water shut-off wrench.) Since the nub is only partially broken off, I am considering trying to use some sort of strong epoxy filler to make an impression/adaptor for the remainder of the nub so I can turn that. Any ideas on what to use? I am thinking about putting some plastic over it, then a collar, so it's not stuck to it permanently, then packing it with epoxy filler. Doable? What would you use and what are my odds for success? Thanks.