hi guys. i was at a job with one of the guys fromm our firm doing service. ecotc 824. i noticed the trap wasnt hughely full so i poured some water down the flue to fill it ( prevent possible flue gases from escaping). anyway this chap said hed never seen that done before ( 5 years experience). was i did ott doing that? went on valliant course and thats waht trainers advised,!