Inline water filters for my camper trailer

A search of the forum revealed only one archived thread from 2006 so I am wondering if there have been any updates in the last 11 years?
I am after an inline water filter for my Cub Brumby camper after getting fed up with the plasticky taste constantly coming from my two water tanks. I am therefore looking for a system that meets the following requirements and would appreciate any comments or recommendations.
1. It is mostly the foul plastic chemical taste that concerns me though filtering dirty water would be also good.
2. I want something that I can mount under the camper, between the water pump and the kitchen sink. Therefore it needs to not hang too low, be robust to handle extreme off road conditions (eg. Think Cape York) and to be easily replaceable when the filter needs flushing or replacing?
3. I see a number of systems like the BEST filters that are attached inline using simple gardening hose fittings. This looks easy but from my experience with garden hose fittings they don't last too long before they start perishing or leaking. Would really like a more robust yet removeable fitting system?
4. Are there any filter systems where they remain permanently attached to the water line with screw removeable filter cartridges? I have seen some systems like this but they look quite big and bulky and would not satisfy 2 requirement above.
If anybody has any real life experience of Susheela a system I would be very interested to hear.
TIA
Bryan