this post was submitted on 09 Feb 2024
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Te Upoko o te Ika a Māui / Wellington
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Seawater is a maintenance nightmare, it's incredibly corrosive to almost any metal, so any pipework would need to be either plastic or concrete. It will also kill plants, so can't be used for watering lawns etc, so this would only be useful for firefighting purposes.
Ships will often use sea water for jobs like flushing toilets, but I can't imagine that being worthwhile running a second water main for.