hot water pressure in bathtub
Call the Plumber back in. Your symptom is indicative of an Anti-Scald Valve problem, since it's just that fixture. It could be that the new fixture wasn't flushed out of manufacturing debris &amp; that ruined the fixture. Maybe this valve just needs adjusting or wasn't set at the factory. Or, maybe it's just plain defective or on recall &amp; must have the cartridge replaced.