Frustration with leaking & corrosion of the 50L model
We live in the inner West of Sydney, and as with other reviewer, we had the same problem- after being in operation for less than 2 years, we noticed early one morning that the 50L electric heater suddenly began leaking badly, which we traced to water coming from under the plastic cap in the centre of the top covering access to the sacrificial anode. On priding off this PVC (?) cap, we found a transparent plastics lining/membrane bulging with hot water and brown rusty corrosion evident on the brass plug that held the sacrificial anode by its braided steel core. We phoned the DUX emergency number and the DUX operator arranged for a plumber to come and inspect it that day. He arrived 2 hours later, and after conducting his check, he declared that the tank itself had failed and formally notified DUX. DUX then agreed to replace the unit which we picked up from one of their outlets 2 days later. DUX did not want the faulty heater returned, so, after the installation of the new tank, we took the old one apart and were horrified to find thick rusty gunk & particles filling the hollows of the brass plugs that sealed the unused portholes, especially the one in the spare socket for the pressure valve as well as around the pressure release valve unit that was installed. When we unscrewed and pulled out the anode (which was surprisingly easy if you have a 27mm socket or tube spanner), we found it to be covered with a dirty brown film as well as showing partial corrosion (which was expected) with the highest amount of corrosion at the brass plug end of the rod. We cannot understand why there was so much iron rust gunk/particles evident in the unit if most of the sacrificial anode was still intact. If the sacrificial anode (probably aluminum) was working and supposedly sacrificing itself, why was there so much evidence of the ferrous tank corroding- even on the exterior of the tank (DUX please answer)? Hope the new one works better and lasts longer or we will be dumping and discouraging people from the brand. Meantime, we have removed the heater element and thermostat board from the old tank and keep them as spare parts for any appropriate future failure.
Dux? More like Dud
my Dux 50l hot water heater manufacture date 26/12/2013 has failed. Water leaking everywhere, has ruined my timber floor which i now have to replace at my own cost. Have called the hotline and they are sending someone out. The cost of a replacement tank is covered but all associated costs aren't covered. So my tank only lasted 2 years, pretty poor in my opinion. Go elsewhere, i have had 3 rheem tanks in the last 5 years as well. Will try a Rinnai when my Dux replacement tank fails in 2 years.