I just took delivery on a Zone VI 16x20 Print Washer and in unpacking it, the small white drain valve on the bottom broke off. Its got a white plastic threaded screw attached to a rubber ball. As you tighten the butterfly on the plastic screw, it pulls the ball tight against the hole and forms a seal.
In any event, that plastic threaded bolt broke off right near the wall, so there's no way to re-attach that butterfly nut. It seemed like the plastic might have been a bit brittle anyway. So, i'm wondering if anyone has ever had to replace one of these. it seems like you might be able to go to home depot and get a proper valve and use it as a replacement. Any thoughts?