Is wall shut off on all the way? if so ballcock has sediment inside,if fluidmaster unit turn off water and take black top and turn 1/4 and it should come of check for sediment,if not that buy new rubber piece at homedepot and install.You can always put in whole new ballcock 10.00$
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Is wall shut off on all the way? if so ballcock has sediment inside,if fluidmaster unit turn off water and take black top and turn 1/4 and it should come of check for sediment,if not that buy new rubber piece at homedepot and install.You can always put in whole new ballcock 10.00$