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Unvented Undersink Water Heaters. For D.I.Yers.

Carrying on from a recent thread about the potential dangers of amateurs installing unvented undersink water heaters incorrectly….. Click on this

 

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  • Brass isn't as waterproof as you may think. There are articles on line which refer to verdigris attacking brass, but in fact I think that it is carbonic acid (IIRC) which turns the brass to verdigris. I had a nice pair of taps which were ruined in this way whilst in storage. Bronze is preferable where water is involved.

    ETA: the water inside the pipe will not rot brass ‘cos it isn’t exposed to the atmosphere. There is not (should not be ? ) any water outside. Things like WC ball valves might scale up or the rubber seals perish, but they don't rot. I wonder why?

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  • Brass isn't as waterproof as you may think. There are articles on line which refer to verdigris attacking brass, but in fact I think that it is carbonic acid (IIRC) which turns the brass to verdigris. I had a nice pair of taps which were ruined in this way whilst in storage. Bronze is preferable where water is involved.

    ETA: the water inside the pipe will not rot brass ‘cos it isn’t exposed to the atmosphere. There is not (should not be ? ) any water outside. Things like WC ball valves might scale up or the rubber seals perish, but they don't rot. I wonder why?

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