I had to replace a gas hot water system recently 135 litre as my previous Dux system had failed. Searched around for prices which ranged from $1,100 to $1,600 installed for the same unit. Newman Barker did the replacement the day after I booked no fuss, very professional and for a good price. Had not used them before but will definitely give them a call if I need a plumber in future. (Campbelltown, NSW Area)

Approximate cost: $1100