I changed a couple of sloan valves on toilets at my church Friday night. Not a bad job and cuts the cost considerably. Simply shut the water off, open the tp and pull out the insides and drop in a new A-38-A Retro water saver kit. Both of the old ones had considerable hard, mineral deposits on top and were not shutting off right. The job was extended by an hour of mopping by miss judging how well one of the stops worked. Likely I will be doing more of this. Some of the stuff is old, 60's. It would be nice if I could really shut the water off at the toilet by screwing in the stop. If I took the stops off, and cleaned them up, maybe attacking the minerals on the rubber parts with acid, could I get them cleaned up to stay for a while? Could they maybe be the source of the low pressure keeping some of the oldest ones from flushing right?
I already checked, they are not the style with the holes in the bowl. I had to flush the one 4 times before I was going to put my had in it to check.