Here's weird operation... - flush the toilet. Most times weak... - bowl drains - tank refill not immediate - after minutes, tank begins to refill very slowly. This happens most of the time; once in a blue moon it operates almost normal. Looking for possible causes... Thanks... Keith

I've replaced this on ten toilets but now I'm stumped. It is a fill valve(old ballcock) model w43ls. Code states the top of the float assembly should be over one inch above the overflow tube. I assume this is when dry. I am beneath it when empty and only about 1/2 inch above when the tank is full. At least the water is 1/2 below the top of the overflow tube. If I raise the float, the water runs over the overflow and if I lower it, I'm beneath code level. I have the valve as low as it can go. I even resorted to cutting the overflow tube down an inch. It doesn't leak and flushes fine but that code issue is nagging at me. I thought these were 'fits all'-could it be wrong for the tank. It appears to be a standard two piece tank. Thank you