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

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?
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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