Just took the advice off this thread and bought one of the blue/white drinking hoses.
Anyone had any issues with them 4 years on?
It is definitely the blue drinking hose!
It is alright for filling the tanks after flushing before hand. The taste that I get may be the result of living in a hot climate.
Noticed when staying at caravan parks, and using the hose to connect to town supply, that there is a definite unpleasant taste and a oily film on top of a cuppa. Yuck!
Bought a new drinking water house today from Kimberley Camping and Outback Supplies in Broome. A Camec brand, drinking water hose.
Since I previously posted on this topic I replaced all the original hoses on my Kimberley Kamper and it solved the taste problems with the on board water supply.
I'll see how it goes!