The violet blue flame is a good flame is achieved by trying to make the air gas mixture correct, usually the lighters bring a regulator that covers or uncovers a hole that causes that correct mixture. It also cleans all the ollin that accumulates in the system, I suppose you did not try to uncover the beak with an inadequate tool. The water does not change temperature because of the flame but acts on a safety valve, which cuts the gas if the flame is turned off. Beware of gas jobs if you don't have previous experience, call a fagots regards