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<span style="font-size:16pt">I put in new vent rites # 33, 11, and 1. The problem is there are big convectors on the first floor. All are 1/4" tapping's which i put #33. On the second floor are column type radiators. I put #1 and 11's . The problem is the first floor convectors heat so rapidly that it satisfies the thermostat shutting the boiler down causing no steam to make it up stairs. If I turn the heat up to 73 they do begin to get hot upstairs but the down stairs is extremely hot. So i was looking for 1/4" tapping straight radiator valves that have small shutter less than 3/32 or adjustable but i can not find one. Thanks</span>