G
gordo
hi, i have put Sentinel 1ltr Heavy Duty Sludge Remover into my system last night and was wondering how long it is recommended to leave it in for before draining it again? I have no heat coming from living room, dining room and garage, all radiators have been renewed with bigger and better ones (apparently) and the boiler has just been replaced also but still they don't heat up. 10MM pipe supply a blame and hopefully sludge. so fingers crossed the sludge remover works. any help appreciated.