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546 posts

Ultimate Geek

# 242957 21-Nov-2018 12:47
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I'm looking to buy a RO/DI system from America. It's for my aquarium hobby. Just need enough for top ups and weekly water changes so a small system will work nicely.


I'm looking at something like this.


Any reason why this wouldn't work here? 3/4" hose is 19mm... that should work, shouldn't it?


anyone have any knowledge experience in this?



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4933 posts

Uber Geek


  # 2131049 21-Nov-2018 12:58
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You might have a problem connecting it to a laundry or a garden tap here. We use BPT (British Pipe Thread) for our plumbing, the damned Yanks use NPT (National Pipe Thread) which is not the same thread pitch.

3885 posts

Uber Geek


  # 2131050 21-Nov-2018 12:58

Hose taps in USA have a coarser thread called Garden Hose Thread. And their plumbing pipes use NPT thread. NZ, along with practically the rest of the world uses BSP pipe thread.

So you will need an adapter. Otherwise just buy locally a fitting to go from your tap to the inlet pipework on your filter.


546 posts

Ultimate Geek

  # 2131110 21-Nov-2018 13:43
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Otherwise just buy locally a fitting to go from your tap to the inlet pipework on your filter.


I guess I don't know what this looks like. It might be a slip on thing like with garden watering system or some type of screw on thing.

2298 posts

Uber Geek


  # 2131122 21-Nov-2018 14:14
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Looks like it uses similar piping and push-fit connectors to plumbed-in water coolers in NZ. It will be doable - I'd suggest just order the thing and then take the pipe to your plumbing wholesaler to get some connections that fit.

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