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Installed some new radiators on an existing circuit in an office block few months ago along with new valves all the radiators work fine apart from one which i have had a call back on late today .Basically as soon as you open the trv you can hear the water whooshing through the rad which is quite loud .Had a little mess about with lockshield and trv butcant seem to quieten this one rad down , any ideas how to solve this??
