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Dux Marathon

Dux Marathon

3.0 from 6 reviews


Review distribution

5 star
4 star
3 star
2 star
1 star



  • 2 reviews

reliable nil probs


we've had our Dux 315 Mararthon for over 11 years with no problems and I have to admit no servicing or anode changing just replaced our tank with same brand Dux but pro flo as no marathon avail but reviews have me worried . used reputable plumber so hoping We haven't purchased a dud this time

Date PurchasedMar 2018

315L Marathon bought in 2005 & Still going strong


Have had our 315L Marathon for over 10 yrs. Had the PTR valve replaced during in warranty, and when it failed again was our inlet water pressure problem than the hot water system, once a pressure limiting valve fitted it has been absolutely problem free. Is on off peak & as a busy family of 4 and have very rarely even run out of hot water.
It is an awesome hot water heater!

Date PurchasedMay 2005


dont buy dux


have had dux solar hot water system since 2009 now we are on our 3rd system rang dux up today 20/7/16 to explain the problem only to be told its out of warranty i told them this is the 3rd one only to be told that is your bad luck you will have to buy a new one so they obviously cannot make a system that can last more than 4 years stay well clear of dux you have been warned now after no sort of help i think its time for consumer affairs to help with all rhe negative feedback you think they would help more



Lasted less than 3 weeks then worst customer service ever!!

1 comment
Dux H.Dux


tony1951Gippsland, VIC

  • 14 reviews



Stay well clear,load of rubbish.Makes one wonder how a Company like this can stay in business.Now own unit from different mob,fingers crossed.
Cheap & easy to swap over.
First unit delivered damaged,easy to tell it was packed that way.Secound unit leaked after 6 months.Unit number 3 thermostat packs up after 18 months.Now at the tip.





Great product. Will buy another this year before the government loonies banned full electric hot water system. Install and forget and no maintenance
Have had a 400l unit for 11 years. It's been cheap to run ($30-$40 a quarter) using off peak power for 5 people. Never ran out of hot water.
None. This unit has worked flawlessly for 11 years.

Questions & Answers



I have a Dux Marathon installed outside to a pipe system that used to be connected to a gravity feed tank in the roof. Recently the water flow (which has never been very strong in this area) has diminished until now it is barely a trickle. Possible causes ?

2 answers

I would contact your Water Supplier to have your Water Meter cleaned first.Then if you have Gal Pipes from the Meter to your home as a Plumber you need to replace them & up grade to copper.

Dux H.Dux

Hi, The water pressure will not be caused by the hot water system its self. The pressure going into the hot water system will be the pressure coming out of the system. I would suggest the same as Tony 1951 to have your water supplier out to have your water meter cleaned and if this does not work contact a plumber, you can contact Dux on 1300 365 115 and we can advise some one in your area how may be able to help.

Get an answer from our members and Dux representatives

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