replaced leaking section of cast iron baseboard. Went to fill system and found 2 more leaks at other baseboards in same room. Once they heated up and expanded the leaks became clear. Quoted replacement and will return to complete. Returned to replace remaining 2 sections of baseboard. Replaced and filled/purged system. System was running fine for 30 minutes. After system got to temp another cast baseboard started leaking through painted crack. We drained system again and turned off zone.