Just had a visit from my neighbour looking for advice on installing a Fluid Master 400 A fill valve in his toilet tank. I explained how to install the flush valve AKA Ball Cock. then showed him the ones I have in our two toilet tanks.
After installation I said do the flush test, what’s that he asked, I explained take a normal amount of toilet paper, put it into the toilet bowl then flush, let the tank refill and repeat two more times. If the toilet paper goes down the drain easily your done.