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yeah that's what i thought - but my partner made the valid point of 'what if' so why not just run it in copper. it would be an awkward run and more pricey in materials and labour for a plumber...eurgh
terlg-
Well I have around 10km of MDPE all around our farms, never had it fail, and there is plenty running through barns which def have rats in and loads just buried in the ground with no protection, has never failed, the only thing I have had fail is some of the joints, but given the flexibility of MDPE you need much less joints than if you do it in copper.
Sam_w
I would have thought you would be fine with MDPE, it is pretty tough stuff, if you are worried for whatever reason, you could put the MDPE inside some ducting for protection, added benefit is that other things could be then pushed through the ducting.